{"title":"Questyle","description":"\u003cp\u003eFounded in Shenzhen in 2012, Questyle designs and manufactures high-tech lossless consumer audio products. Questyle's mission is to solve technical issues, overcome environmental constraints, and use a simple and free-spirited approach to provide users with a wonderful immersive audio experience.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIf you're looking for the perfect addition to your audio setup or have any questions, feel free to reach out (\u003c\/span\u003e\u003ca class=\"text-link\" title=\"mailto:hello@bloomaudio.mom\" href=\"mailto:hello@bloomaudio.mom\"\u003eemail\u003c\/a\u003e or \u003ca data-reamaze-lightbox-anchored=\"true\" data-reamaze-lightbox=\"contact\" href=\"\/conversations\/new\"\u003emessage\u003c\/a\u003e!)\u003c\/p\u003e","products":[{"product_id":"questyle-cma-fifteen","title":"Questyle CMA Fifteen | DAC and Headphone Amplifier","description":"\u003cp\u003e\u003cimg style=\"display: block; margin-left: auto; margin-right: auto; width: 50%;\" alt=\"Questyle logo black\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-nhb12-logo-blk.jpg?v=1698074726\"\u003e\u003c\/p\u003e\n\u003ch4\u003eMusicality and Accuracy Converge in the CMA Fifteen from Questyle\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eThe latest in Current Mode Amplification technology\u003c\/li\u003e\n\u003cli\u003eUpgraded power and connectivity\u003c\/li\u003e\n\u003cli\u003eStep into the latest tech with LDAC Bluetooth support, or go all analog and use the phono preamp function\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ctable width=\"90%\" bgcolor=\"”#f6f6f6”\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cspan style=\"color: #a30e0b;\"\u003e\u003cstrong\u003eBloom's Take\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe CMA Fifteen is the total package for a DAC\/Amp combo. It has the flexibility to function as a standalone DAC or amp, along with Bluetooth connectivity and a wide array of other features. It delivers a clear upgrade to the CMA Twelve, and is strongly competitive in its price range. Altogether, the CMA Fifteen is a clear winner that should position Questyle as one of the brands to beat at this level.\u003c\/p\u003e\n\u003cp\u003e\u003ca title=\"Questyle CMA Fifteen\" href=\"https:\/\/bloomaudio.mom\/blogs\/articles\/questyle-cma-fifteen-review\"\u003eRead the full review.\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eEvolution never stops. We as humans have never stopped questing, and neither should a true flagship device. With an outstanding performance level, and all the ingredients for a new groundbreaking device, we present you our new Flagship DAC\/Headphone Amp: The CMA Fifteen.\u003c\/p\u003e\n\u003ch3\u003eCommemorating the 15th anniversary of Questyle’s revolutionary Current Mode Amplification Technology.\u003c\/h3\u003e\n\u003cp\u003eAt its core, Current Mode Amplification uses current, instead of voltage, to amplify audio signals. It is a state-of-the-art technology in audio amplification, leading to tremendous performance differences when compared to traditional audio amplifiers. As the “engine” of the audio system, Current Mode Amplification features a fully discrete and topological structure, and can achieve ultra-high sound performance that reproduces music so faithfully, it feels like you are in the original recording room. Using Current Mode Amplification technology, listeners can attain a much better listening experience, even when using consumer-grade headphones and speaker systems.\u003c\/p\u003e\n\u003cp\u003eAfter 3 years of pre-research with ESS, Questyle selected the flagship DAC ES9038PRO, a decoding chip with the most powerful performance of any DAC invented to date, and jointly launched CMA Fifteen with ESS, supporting 32bit\/768K and DSD 512 master band formats.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/15_front_2048x2048.jpg?v=1639520004\" alt=\"Questyle CMA Fifteen\"\u003e\u003c\/p\u003e\n\u003ch3\u003eCurrent Mode Amplification Meets Current mode DAC=Current Mode²\u003c\/h3\u003e\n\u003cp\u003eTo chase extreme performance, almost all high-end DAC chips from world-renowned manufacturers feature current-type output, which in most traditional amplifiers, is then coupled with an IV converter and classical amplifier architecture. But we at Questyle wondered: if the DAC’s output is already current-type, why don’t we also amplify that signal in current-mode? And that’s exactly what we did in the CMA Fifteen: we use the ES9038PRO current-mode DAC, and couple that to four Current Mode Amplifiers, which together operate in fully balanced mode to achieve “system-level lossless” purity.\u003c\/p\u003e\n\u003ch3\u003eCMA Fifteen supports MQA full decoding\u003c\/h3\u003e\n\u003cp\u003eMQA is an award-winning British technology that delivers the sound of the original master recording. The master MQA file is fully authenticated and is yet small enough to stream or download.\u003c\/p\u003e\n\u003cp\u003eThe CMA Fifteen includes MQA technology, which enables you to play back MQA audio files and streams, delivering the sound of the original master recording.\u003c\/p\u003e\n\u003ch3\u003eCMA Fifteen supports LDAC Bluetooth\u003c\/h3\u003e\n\u003cp\u003eAs a global member of Sony, we equipped the CMA Fifteen with LDAC Bluetooth. LDAC™ is a new audio technology from Sony that allows you to enjoy high quality wireless audio via Bluetooth. With 3x data transmission rates as compared to traditional Bluetooth, LDAC provides an enhanced wireless listening experience for all your music.\u003c\/p\u003e\n\u003ch3\u003eBring Apple music lossless work to your high-end audio system\u003c\/h3\u003e\n\u003cp\u003eThe CMA Fifteen supports Apple Music Lossless. In addition to the classic USB Type-B input, the CMA Fifteen now also features a USB Type-C input to solve the wire conversion loss through cables. You can finally enjoy the new experience of high resolution lossless audio online, anytime, anywhere.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/15_life_focal_2048x2048.jpg?v=1639520027\" alt=\"Questyle CMA Fifteen\"\u003e\u003c\/p\u003e\n\u003ch3\u003eCMA Fifteen as a Preamp for your record player\u003c\/h3\u003e\n\u003cp\u003eCMA Fifteen now comes with analog inputs on the back of the unit. Connect CMA Fifteen to your record player as a preamp, you can enjoy the best possible sound quality. If you ever get tired of your digital music, the CMA Fifteen can now also take you back to the golden age of records.\u003c\/p\u003e\n\u003ch3\u003eContinuity and Inheritance\u003c\/h3\u003e\n\u003cp\u003eQuestyle believes that the greatest products are born from the smallest details. The CMA Fifteen continues the classic design concept and perfect manufacturing technology of its previous lines of products, while further improving on all the details. Resonance, for example, is always a detail that could easily be ignored in the design process. However, mechanical vibration does indeed affect audio signal processing and the resulting sound. To avoid this resonance, the CMA Fifteen chassis is formed from 10mm-thick aircraft-grade Aluminum 6063, with precise machining tolerances of ±0.02mm.\u003c\/p\u003e","brand":"Questyle","offers":[{"title":"Default Title","offer_id":39670972874827,"sku":"CMA15","price":1799.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/products\/Questyle-CMA-Fifteen-DAC-and-Headphone-Amplifier.jpg?v=1639600795"},{"product_id":"questyle-nhb15","title":"Questyle NHB15 | USB-C DAC\/Amp + Dynamic Universal IEMs","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-nhb12-logo-blk.jpg?v=1698074726\" alt=\"Questyle logo black\" style=\"display: block; margin-left: auto; margin-right: auto; width: 50%;\"\u003e\u003c\/p\u003e\n\u003ch4\u003eQuestyle NHB15 Makes Lossless Listening Easy with your USB-C Device\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eIncluded DAC cable provides high resolution audio with any USB-C device\u003c\/li\u003e\n\u003cli\u003eCompatible with any other DAC or amp with the included 3.5mm cable\u003c\/li\u003e\n\u003cli\u003eCustom Dynamic driver provides powerful bass and surprising clarity\u003c\/li\u003e\n\u003cli\u003ePatented Current Mode Technology provides ultra-efficient design that saves phone battery life and yields incredibly low distortion\u003c\/li\u003e\n\u003cli\u003eCheck out \u003ca href=\"https:\/\/bloomaudio.mom\/products\/questyle-nhb12\" title=\"Questyle NHB12 Dynamic Universal IEM\/DAC\/Amp\"\u003eQuestyle's NHB12\u003c\/a\u003e for the Apple Lightning version\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"Questyle NHB15 with pouch\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-nhb15-pouch_673eedcf-e3fe-4779-9f3f-f6e561f55571_2048x2048.jpg?v=1707152895\"\u003e\u003c\/p\u003e\n\u003ch3\u003eExperience True Lossless Sound\u003c\/h3\u003e\n\u003cp\u003eNHB15 is convenient to use: just plug and play without the need for any drivers or settings. Questyle NHB15 delivers studio-quality 192kHz audio with 0 distortion. It is a high-resolution audio powerhouse, capable of handling audio files up to 24-bit. This means you can enjoy studio-quality music on the go, with an astonishing 6.5 times more information than standard CDs.\u003c\/p\u003e\n\u003cp\u003eCombining an integrated DAC and Current Mode Amplification, NHB15 provides unparalleled sound quality.\u003c\/p\u003e\n\u003cp\u003eThe USB-C based NHB15 improves the USB interface from its predecessor and is compatible with the entire iPhone 15 series, the latest iPads, Android, and Harmony OS. It's also fully compatible with Windows and Mac OS systems, allowing users to enjoy lossless music across a broad spectrum of smart devices.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Questyle NHB15 dramatic closeup of mirror-like shells with detached cable\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-nhb15-ba1-thumb_2048x2048.jpg?v=1707152827\"\u003e\u003c\/p\u003e\n\u003ch3\u003eSiP Chip for Independent DAC and AMP: MA2430\u003c\/h3\u003e\n\u003cp\u003eQuestyle Technology, in collaboration with strategic partner USI, embarked on a two-year journey, starting in 2021, to develop of a series of chips in pursuit of an uncompromising auditory experience. The MA2430 incorporates Current Mode Amplification in the entire chain of lossless audio signal processing. Operating at a minimum voltage of 2V, the system requires only 3mA of operating current – half the power consumption of a typical TWS IEM.\u003c\/p\u003e\n\u003cp\u003eHowever the MA2430 boasts the DAC capabilities for master tape-level music up to 192k and the performance of driving headphones with ultra low distortion at 0.00002%, challenging the physical limits of testing with top-tier audio analyzers.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"SiP chip held by tweezers with Questyle and USI logos\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-nhb15-0-sip.jpg?v=1707161572\"\u003e\u003c\/p\u003e\n\u003ch3\u003eOptimized Design\u003c\/h3\u003e\n\u003cp\u003eThe balance between comfort and sound quality is crucial yet often overlooked when it comes to in-ear headphones. During the early stages of NHB15 development, designers collected extensive data from ear model databases. Using the data combined with real world testing, they achieved the ultimate design.\u003c\/p\u003e\n\u003ch3\u003eHigh Quality Accessories\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDetachable Cable Design\u003c\/strong\u003e\u003cbr\u003eThe NHB15 features a detachable cable design. What's more, a classic 3.5mm cable is included in the box. The interchangeable cables can be paired with other devices.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-nhb15-1-cables.jpg?v=1707161451\" alt=\"Questyle NHB15 detachable cable diagram\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStorage Pouch\u003c\/strong\u003e\u003cbr\u003eThe NHB15 comes with a specially designed headphone storage pouch that's compact and convenient to carry in your pocket on-the-go.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Questyle NHB15 In the Box\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-nhb15-in-the-box_2048x2048.jpg?v=1707152850\"\u003e\u003c\/p\u003e","brand":"Questyle","offers":[{"title":"Default Title","offer_id":40995248144459,"sku":"QU-NHB15","price":229.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-nhb15-0-thumb.jpg?v=1707152825"},{"product_id":"questyle-m12i-portable-dac","title":"Questyle M12i | Portable DAC and Amp","description":"\u003cp\u003e\u003cimg style=\"display: block; margin-left: auto; margin-right: auto; width: 50%;\" alt=\"Questyle logo black\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-nhb12-logo-blk.jpg?v=1698074726\"\u003e\u003c\/p\u003e\n\u003ch4\u003eQuestyle M12i Combines Sound, Aesthetics, and MFi Certification for an Affordable, Incredible Audio Experience\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eLatest update to one of the best value DACs in the world\u003c\/li\u003e\n\u003cli\u003eAutomatically detects impedance for improved performance with a variety of headphones\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCan handle up to PCM384kHz\/32bit and DSD512\u003c\/li\u003e\n\u003cli\u003eOptimizes power consumption to prevent premature phone battery drainage\u003c\/li\u003e\n\u003cli\u003eUSB-C input and 3.5mm headphone output\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m12-i.jpg?v=1723235657\" alt=\"Questyle m12i closeup sitting on vinyl record stack\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003ch3\u003eMobile Headphone Amplifier with DAC\u003c\/h3\u003e\n\u003cp\u003eAt the 2024 CES exhibition, Questyle unveiled its 2nd Generation popular mobile headphone amplifier with the DAC m12i.\u003c\/p\u003e\n\u003cp\u003eFollowing the success of the \u003ca title=\"Questyle M12 Portable DAC and Amp\" href=\"https:\/\/bloomaudio.mom\/products\/questyle-m12\"\u003e1st Generation M12\u003c\/a\u003e, M12i also features high-performance audio signal processing. It breaks through the limitations of integrated audio circuits in phones in terms of technology, cost, and size. With Questyle's unique Current Mode Amplification paired with the ESS flagship USB DAC chip, it allows users to fully enjoy lossless audio content from streaming platforms with traditional HiFi headphones, ensuring the best audio experience.\u003c\/p\u003e\n\u003ch3\u003eHardcore Technological Aesthetics\u003c\/h3\u003e\n\u003cp\u003eThe design of the Kunlun glass window coupled with the exquisite craftsmanship of the PCD, presents the critical elements of signal processing and technological aesthetics.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Questyle M12i x2 front and rear highlighting glass window and internal PCB\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m12i-1-lifestyle.jpg?v=1707165333\"\u003e\u003c\/p\u003e\n\u003ch3\u003eApple MFi Certified for Guaranteed Performance and Compatbility\u003c\/h3\u003e\n\u003cp\u003eThe \"i\" in M12i indicates that it has been certified by Apple's MFi. MFi certification ensures perfect support for iPhone\/iPad and seamless integration into the Apple ecosystem. It complies with Apple's stringent requirements for external devices in terms of power consumption and compatibility, avoiding the risk of damage to phones and systems from arbitrary device pairings.\u003c\/p\u003e\n\u003ch3\u003ePatented Low Power Consumption SiP Current Mode Amplifier\u003c\/h3\u003e\n\u003cp\u003eQuestyle's exclusive patented \"Current Mode\" amplifier technology is the fundamental hardware that sets Questyle apart from other amps. As the engine of the headphone system, the amplifier has a crucial impact on sound quality. Thanks to the independently development CMA module, the M12i is not constrained by the power limitations of op-amps chips. It has ultra-low distortion of 0.0003% and extremely high current output capabilitiy. Thanks to the patented Current Mode amplification and the use of TOREX's efficient power management system, it features high-performance and low-power consumption. Hence, it lowers the risks of overheating or interruptions in the case of a long use.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/cma-12i-chart_2048x2048.jpg?v=1707158906\" alt=\"Questyle M12i noise floor graph\"\u003e\u003c\/p\u003e\n\u003ch3\u003eFull Compatibility for True Lossless Enjoyment\u003c\/h3\u003e\n\u003cp\u003eDuring development, Questyle Labs conducted extensive testing and targeted optimization for M12i's compatibility with mainstream smartphones and tablets. It managed to achieve high compatibility with iOS, HarmonyOS, and Android versions 5.1 and above. As for PC apps, it supports Windows 10 and above, and macOS. As a result, HiFi headphone users can fully enjoy lossless audio content from streaming platforms anytime, anywhere.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"apps on multiple phones highlighting OS and streaming badges\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m12i-compatible_600x600.jpg?v=1707166003\"\u003e\u003c\/p\u003e\n\u003ch3\u003eSmart Impedance Matching\u003c\/h3\u003e\n\u003cp\u003eWhen headphones are plugged into M12i, the built-in smart impedance detection system automatically identifies the headphone impedance and adpats accordingly – much like an automatic transmission in a car. Upon detecting the insertion of headphones, M12i instantly activates working mode, recognizing and configuring the corresponding gain for the connected headphones. When the gain light is illuminated, a single indicator represents low gain, while dual red indicators represent high gain. If M12i is connected as a mobile DAC to HiFi systems, active speakers, etc. it will automatically switch to high-level output, providing sufficient support for HiFi audio systems.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m12i-diagram.jpg?v=1707167130\" alt=\"Questyle M12i internal components diagram\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m12i-in-the-box_43112d5b-8b57-4337-a50c-8304de35be5f_2048x2048.jpg?v=1707158804\" alt=\"Questyle M12i In the Box\"\u003e\u003c\/p\u003e","brand":"Questyle","offers":[{"title":"New","offer_id":41394395349067,"sku":"QU-M12i","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Open Box","offer_id":41394395381835,"sku":"QU-M12i-OB","price":69.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m12i-0-thumb.jpg?v=1707167308"},{"product_id":"questyle-m15i-portable-dac","title":"Questyle M15i | Balanced Portable DAC and Amp","description":"\u003cp\u003e\u003cimg style=\"display: block; margin-left: auto; margin-right: auto; width: 50%;\" alt=\"Questyle logo black\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-nhb12-logo-blk.jpg?v=1698074726\"\u003e\u003c\/p\u003e\n\u003ch4\u003eM15i is the MFi Certified Update to Questyle's Beloved Ultra-portable Powerhouse\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eM15i boasts near universal compatibility with any mobile device or computer\u003c\/li\u003e\n\u003cli\u003e3.5mm and 4.4mm output with selectable gain, provides higher level of power for a wider range of headphones\u003c\/li\u003e\n\u003cli\u003eCan handle up to PCM768kHz\/32bit and DSD512\u003c\/li\u003e\n\u003cli\u003eOptimizes power consumption to prevent premature phone battery drainage\u003c\/li\u003e\n\u003cli\u003eUltra-low noise floor of -130dB for a pure background and real sound\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" alt=\"questyle m15i sitting on wooden table with iems\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m15i-lifestyle.jpg?v=1721655578\"\u003e\u003c\/div\u003e\n\u003ch3\u003eTechnology Without Boundaries\u003c\/h3\u003e\n\u003cp\u003eQuestyle and ESS along with research teams in the United States, China, and Canada, maintain a continuous and fruitful collaboration to exceed customer expectations in mobile decoding headphone amplifiers. The M15i uses the updated ESS flagship USB DAC chip ES9281AC, supporting D\/A converting up to PCM768 and DSD512 (\u003ca href=\"https:\/\/bloomaudio.mom\/products\/questyle-m15\" title=\"Questyle M15 Portable DAC and Amp\"\u003e1st Gen M15\u003c\/a\u003e supports up to PCM384 and DSD256). Audio distortion performance and output power have also been upgraded compared to the previous generation.\u003c\/p\u003e\n\u003cp\u003eThe original M15 was a best seller at Bloom and never actually experienced a slowdown in sales during its lifecycle. With the M15i, Questyle looks to expand its predecessor's popularity and bring and even higher tier of premium audio enjoyment in a portable form factor.\u003c\/p\u003e\n\u003ch3\u003eHardcore Technological Aesthetics\u003c\/h3\u003e\n\u003cp\u003eThe design of the Kunlun glass window coupled with the exquisite craftsmanship of the PCD, presents the critical elements of signal processing and technological aesthetics.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m15i-0-lifestyle.jpg?v=1707171307\" alt=\"Questyle M15i x2 front and rear highlighting glass window and internal PCB\"\u003e\u003c\/p\u003e\n\u003ch3\u003eApple MFi Certified for Guaranteed Performance and Compatbility\u003c\/h3\u003e\n\u003cp\u003eThe \"i\" in M15i indicates that it has been certified by Apple's MFi. MFi certification ensures perfect support for iPhone\/iPad and seamless integration into the Apple ecosystem. It complies with Apple's stringent requirements for external devices in terms of power consumption and compatibility, avoiding the risk of damage to phones and systems from arbitrary device pairings.\u003c\/p\u003e\n\u003ch3\u003ePatented SiP Current Mode Amplifier\u003c\/h3\u003e\n\u003cp\u003eThe M15i contains two groundbreaking \"current mode\" patented amplification SiP modules developed by Questyle Technology. Overall, it totals four current mode amplification engines, delivering powerful and clear sound. Given that it operates in the current domain, the low impedance characteristics of the current-mode circuit result in a bandwidth of up to 1MHz and distortion as low as 0.0003%, capturing hidden details in songs.\u003c\/p\u003e\n\u003cp\u003eAs a result, the risk of overheating or interruptions during long listening sessions is extremely low thanks to the patented current mode amplification (TOREX precision power management technology) as well as the M15i's high performance and low power consumption.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Questyle M15i explosion highlighting TOREX component\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m15i-2-torex_600x600.jpg?v=1707184991\"\u003e\u003c\/p\u003e\n\u003ch3\u003eFull Compatibility for True Lossless Enjoyment\u003c\/h3\u003e\n\u003cp\u003eDuring development, Questyle Labs conducted extensive testing and targeted optimization for M15i's compatibility with mainstream smartphones and tablets. Developers managed to achieve high compatibility with iOS, HarmonyOS, and Android versions 5.1 and above. As for PC, it supports Windows 10 18.3 and above (driver-free) as well as macOS. Hence, all HiFi headphone users can enjoy lossless audio on streaming platforms anytime, anywhere.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m12i-compatible_600x600.jpg?v=1707166003\" alt=\"apps on multiple phones highlighting OS and streaming badges\"\u003e\u003c\/p\u003e\n\u003ch3\u003e3.5mm and 4.4mm Dual Ports with Gain Adjustment\u003c\/h3\u003e\n\u003cp\u003eThe M15i, equipped with (x4) current mode engines, supports 3.5mm single-ended and 4.4mm fully balanced output modes. It also features manual gain adjustment, allowing users to choose the gain mode according to personal preferences, headphone characteristics, or the audio system, rendering the M15i suitable for a wide range of apps and devices.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Questyle M15i front quarter diagram highlighting manual gain switch\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m15i-3-gain_600x600.jpg?v=1707185665\"\u003e\u003c\/p\u003e\n\u003ch3\u003eDynamic Sampling Rate Display\u003c\/h3\u003e\n\u003cp\u003eWhen playing music, the data status indicator will light up.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA single \u003cspan style=\"color: #ff2a00;\"\u003e\u003cstrong\u003ered\u003c\/strong\u003e\u003c\/span\u003e indicator means PCM data with a sampling rate not exceeding 48kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #ff2a00;\"\u003eDual red\u003c\/span\u003e\u003c\/strong\u003e indicators represent high sampling rate PCM data or DSD audio data\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"Closeup active M15i connected to device showing dual red sampling indicators\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m15i-4-sampling.jpg?v=1707186731\"\u003e\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ch4\u003eAppearance\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e CNC machined aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 61.9mm x 27.9mm x 12mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatible Operating Systems\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAndroid phones and tablets:\u003c\/strong\u003e Android 5.0 and above\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePC:\u003c\/strong\u003e Win10 1803 and above\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApple cellphone:\u003c\/strong\u003e iOS (You need to buy an OTG cable for Lightning to USB-C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApple computer:\u003c\/strong\u003e Mac OS\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eDAC Capability\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePCM:\u003c\/strong\u003e PCM: 44.1kHz – 768kHz (16\/24\/32Bit)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDSD:\u003c\/strong\u003e DSD64 (1Bit 2.8MHz), DSD128 (1Bit 5.6MHz), DSD256 (1Bit 11.2MHz), DSD512 (1Bit 22.4MHz)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eOutput Power\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e3.5mm:\u003c\/strong\u003e\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003eRL=300Ω | Po=11.97mW\u003c\/li\u003e\n\u003cli\u003eVout (Max)=1.895Vrms\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\u003cstrong\u003e4.4mm:\u003c\/strong\u003e\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003eRL=300Ω | Po=22.6mW\u003c\/li\u003e\n\u003cli\u003eVout (Max)=2.624Vrms\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eFrequency Response \u0026amp; THD\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e ±0.1dB (20Hz-20kHz) | ±2dB (20Hz-80kHz)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTHD+N:\u003c\/strong\u003e 0.0003%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDAC:\u003c\/strong\u003e ESS flagship USB DAC chip ES9281AC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eM15i Mobile Headphone Amplifier with DAC\u003c\/li\u003e\n\u003cli\u003eUSB Type-C to Type-C Cable\u003c\/li\u003e\n\u003cli\u003eUSB Type-C to Type-A Cable\u003c\/li\u003e\n\u003cli\u003eWarranty Card\u003c\/li\u003e\n\u003cli\u003eUser Manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"Questyle M15i in the box\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m15i-in-the-box_2048x2048.jpg?v=1707161875\"\u003e\u003c\/p\u003e","brand":"Questyle","offers":[{"title":"New","offer_id":41989792170059,"sku":"QU-M15i","price":179.0,"currency_code":"USD","in_stock":true},{"title":"Open Box","offer_id":41989792202827,"sku":"QU-M15i-OB","price":179.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m15i-1-thumb.jpg?v=1707171348"},{"product_id":"questyle-cma-eighteen-master","title":"Questyle CMA Eighteen Master | Flagship DAC and Headphone Amplifier","description":"\u003cp\u003e\u003cimg style=\"display: block; margin-left: auto; margin-right: auto; width: 50%;\" alt=\"Questyle logo black\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-nhb12-logo-blk.jpg?v=1698074726\"\u003e\u003c\/p\u003e\n\u003ch4\u003eQuestyle's Newest, Refined Flagship Desktop DAC\/Amp, the CMA Eighteen Master Edition\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eEnhanced and optimized Questyle patented Current Mode Amplification technology\u003c\/li\u003e\n\u003cli\u003ePremium, military grade Rogers PCB material\u003c\/li\u003e\n\u003cli\u003eUpgraded XMOS XU316 USB platform supporting up to PCM768 \/ DSD512\u003c\/li\u003e\n\u003cli\u003eUpgraded Bluetooth mode supporting both aptX HD and LDAC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"Questyle CMA Eighteen Master front right quarter highlighting potentiometer\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-cma18-mstr-1-lifestyle.jpg?v=1707339607\"\u003e\u003c\/p\u003e\n\u003ch3\u003eCrafting for Pursuit\u003c\/h3\u003e\n\u003cp\u003eSince the debut of the first CMA, each flagship in Questyle's series has shared the same soul: Current Mode Amplification Technology. The \u003ca title=\"Questyle CMA Fifteen DAC and Headphone Amp\" href=\"https:\/\/bloomaudio.mom\/products\/questyle-cma-fifteen\"\u003eCMA Fifteen\u003c\/a\u003e, released in 2020, featured the flagship ESS Current mode DAC for the first time. Coupled with Current Mode Amplification, it established the CMA series as a new era of full current processing, essentially \"lossless throughout the entire chain.\"\u003c\/p\u003e\n\u003cp\u003eThe CMA Fifteen was almost perfect 3 years ago, but Questyle sought to improve it. Over the past 3 years, they have continually refined, explored and sought superior designs giving you their latest flagship: the CMA Eighteen Master.\u003c\/p\u003e\n\u003ch3\u003eThe New Flagship: CMA Eighteen Master\u003c\/h3\u003e\n\u003cp\u003eThe CMA Eighteen Master features the upgraded XMOS XU316 USB platform, supporting D\/A conversion up to PCM768@32Bit \/ DSD512. It also supports both USB-B and USB-C interfaces, avoiding audio quality degradation issues associated with USB-C converters.\u003c\/p\u003e\n\u003cp\u003eThe CMA Eighteen Master's bluetooth mode has been upgraded to support both aptX-HD and LDAC, ensuring optimal wireless sound quality and connectivity.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Questyle CMA Eighteen Master front left quarter\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-cma18-mstr-0-lifestyle.jpg?v=1707339482\"\u003e\u003c\/p\u003e\n\u003ch3\u003eHalf Reverence, Half Praise\u003c\/h3\u003e\n\u003cp\u003eThe CMA Eighteen Master embodies Questyle's pure design language, featuring a sandblasted matte CNC panel complemented by laser-engraved dark characters, mechanical toggle switches, and amber indicator lights, paying homage to the previous Gen \u003ca title=\"Questyle CMA Fifteen DAC and Headphone Amp\" href=\"https:\/\/bloomaudio.mom\/products\/questyle-cma-fifteen\"\u003eCMA Fifteen\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eCurrent Mode Amplification\u003c\/h3\u003e\n\u003cp\u003eThis patented Questyle technology is a state-of-the-art audio amp design different from traditional amplification. As the \"engine\" of the audio system, Current Mode Amplification with fully discrete and topological structure, achieves ultra-high sound performance close to the original recording, yielding a much better listening experience with your premium headphones or speakers.\u003c\/p\u003e\n\u003cp\u003eTo dissipate the substantial heat generated by processing ultra-high-definition lossless audio data with the ES9039PRO, the PCB has been upgraded to Rogers material. Originally designed for military equipment, missiles, and specialized instruments, they are approximately 20 times the cost of ordinary materials.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Questyle CMA Eighteen Master PCB with component logos\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-cma18-mstr-0-pcb.jpg?v=1707339873\"\u003e\u003c\/p\u003e\n\u003ch3\u003eSynchronized Performance Enhancement\u003c\/h3\u003e\n\u003cp\u003eThe performance of the headphone amp and independent pre-amp have also been enhanced. The latest optimized Current Mode Amplifier, combined with a Rogers board with a dielectric constant only 1\/10th of regular PCBs, shows a 30% improvement of performance in distortion tests compared to the previous generation. There is also a noticeable improvement in the dynamic range and background tranquility.\u003c\/p\u003e\n\u003cp\u003eThe headphone amplifier features a fully balanced architecture. Along with ALS quad analog potentiometers and peak current output capable of up to 3A, the CMA Eighteen Master will unleash the full potential of all high-end headphones.\u003c\/p\u003e\n\u003cp\u003eAdditionally, the digital power and Amp\/DAC power are entirely independent, ensuring the purest signal processing. An independent NORATEL toroidal transformer and Schottky rectifier provide the cleanest power to the analog side of the DAC.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-cma18-mstr-0-components.jpg?v=1707340000\" alt=\"Questyle CMA Eighteen with top removed showing internal components and PCB\"\u003e\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ch4\u003eInput\/Output Interface\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eDigital Input\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSB\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eUSB-C and USB-B\u003c\/li\u003e\n\u003cli\u003ePCM: 44.1kHz-768kHz\/32Bit\u003c\/li\u003e\n\u003cli\u003eNative DSD: DSD64, DSD128, DSD256, DSD512\u003c\/li\u003e\n\u003cli\u003eDoP DSD: DSD64, DSD128,DSD256\u003c\/li\u003e\n\u003cli\u003eSupports UAC 2.0\u003c\/li\u003e\n\u003cli\u003eSupports Win XP\/Vista\/7\/8\/10\/11, Linux, Android, HarmonyOS, macOS and iOS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e Under Win10, will need to install Questyle's proprietary ASIO driver. Win10 system supports DOP DSD256 without driver, but supports Native DSD512 with driver installed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical + COAX:\u003c\/strong\u003e Supports PCM 44.1 kHz~192kHz\/24Bit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth:\u003c\/strong\u003e Supports BC, AAC, apt, aptx-HD, LDAC (up to 96kHz\/24Bit, 990kps \/ 909kps)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAnalog Input:\u003c\/strong\u003e RCA (std. level 2Vrms)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHeadphone Amplifier Output\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e4.4mm BAL\u003c\/li\u003e\n\u003cli\u003e4-pin BAL\u003c\/li\u003e\n\u003cli\u003e6.3mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e High\/Standard bias can be set via BIAS switch on front panel | STD\/LOW Gain can be set via (x4) Gain switches on bottom of amp\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePre-Amp Output\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e(x1) XLR\u003c\/li\u003e\n\u003cli\u003e(x1) RCA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e output level can be set via STD\/Studio switch | volume can be controlled by ADJ\/FIX switch on rear\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eHeadphone Amplifier\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Output Power\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e6.3mm: 188mW@3000 | 1.5W@320\u003c\/li\u003e\n\u003cli\u003e4.4mm BAL \/ XLR 4-pin BAL: 765mW@3000 | 2W@320\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTHD+N:\u003c\/strong\u003e \u0026lt; 0.0003%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e ±0.2dB (DC-22kHz) @48kHz\/24Bit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSNR\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e6.3mm: \u0026gt; 117dB\u003c\/li\u003e\n\u003cli\u003e4.4mm BAL \/ XLR 4-pin BAL: \u0026gt; 120dB\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePre-amplifier\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Analog Output Level\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eRCA: 2V (STD), Studio mode output increased to 14dBu\u003c\/li\u003e\n\u003cli\u003eXLR: 4V (STD), Studio mode output increased to 20dBu\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTHD+N:\u003c\/strong\u003e \u0026lt;0.0003%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e ±0.2dB (DC-22kHz) @48kHz\/24Bit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSNR\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eRCA: \u0026gt;116dB\u003c\/li\u003e\n\u003cli\u003eXLR: \u0026gt;119dB\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Questyle","offers":[{"title":"Default Title","offer_id":41535837667403,"sku":"QU-CMA18-MSTR","price":2699.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-cma18-mstr-0-thumb.jpg?v=1707338310"},{"product_id":"questyle-m18i","title":"Questyle M18i | Bluetooth Portable DAC and Amp","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-nhb12-logo-blk.jpg?v=1698074726\" alt=\"Questyle logo black\" style=\"display: block; margin-left: auto; margin-right: auto; width: 50%;\"\u003e\u003c\/p\u003e\n\u003ch4\u003eM18i Pushes the Limit of Ultra-Portable DAC Dongles with Both Bluetooth Capability and Lossless Decoding\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDual flagship ES9219Q DACs\u003c\/li\u003e\n\u003cli\u003eEquipped with Bluetooth 5.4\u003c\/li\u003e\n\u003cli\u003e3.5mm and 4.4mm outputs for versatile headphone compatibility\u003c\/li\u003e\n\u003cli\u003eUltra-low noise floor of -130dB for a pure background and real sound\u003c\/li\u003e\n\u003cli\u003eSupports up to 384kHz (16\/24\/32-bit) PCM, delivering rich, high-fidelity audio\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/bloomaudio.mom\/collections\/questyle\/products\/questyle-m18i-case\"\u003eLeather protective case\u003c\/a\u003e available\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"Questyle M18i DAC\/Amp front and back sitting on black table side lit on black background\" height=\"1365\" width=\"2048\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m18i-main-banner.webp?v=1737388498\"\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnology Without Boundaries\u003c\/h3\u003e\n\u003cp\u003eThe M18i contains four sets of SiP modules that use Questyle’s patented Current\u003cbr\u003eMode Amplification, providing both powerful drive and delicate timbre. The M18i also features ESS’s flagship ES9219Q Combo DAC, a dual- DAC mono design, and a TTA (Three-Tier Architecture) DAC framework. Together, these provide performance equivalent to large desktop devices, while raising the bar for portable sound quality.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m18i-amplifier-diagram.webp?v=1737388934\" width=\"2048\" height=\"1365\" alt=\"Questyle M18i DAC\/amp amplification diagram\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe Questyle M18i features wired USB and dual-mode lossless Bluetooth connectivity, powered by a 16-core XMOS316 USB platform for seamless compatibility with smartphones, PCs, and gaming consoles.\u003c\/p\u003e\n\u003cp\u003eAs the first M-series product with Qualcomm Snapdragon Sound, the M18i also introduces intelligent battery management, a high-definition OLED screen, and a microphone for clear voice calls. Offering exceptional Hi-Fi audio via Bluetooth or USB, the M18i delivers a premium listening experience.\u003c\/p\u003e\n\u003ch3\u003eApple MFi Certified for Guaranteed Performance and Compatbility\u003c\/h3\u003e\n\u003cp\u003eThe \"i\" in M15i indicates that it has been certified by Apple's MFi. MFi certification ensures perfect support for iPhone\/iPad and seamless integration into the Apple ecosystem. It complies with Apple's stringent requirements for external devices in terms of power consumption and compatibility, avoiding the risk of damage to phones and systems from arbitrary device pairings.\u003c\/p\u003e\n\u003ch3\u003ePatented SiP Current Mode Amplifier\u003c\/h3\u003e\n\u003cp\u003eThe Questyle M18i prioritizes resolving trade-offs between size, power efficiency, and audio performance in portable, battery-powered devices. It features two patented quad-core Current Mode Amplifier (CMA) SiP modules, delivering powerful drive with delicate timbre and achieving ultra-low distortion of 0.0002%.\u003c\/p\u003e\n\u003cp\u003eBy combining CMA technology with TOREX’s high-efficiency power management, the M18i ensures low power consumption without compromising performance, setting a new benchmark for the Questyle M series.\u003c\/p\u003e\n\u003ch3\u003eSound Quality\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eA low noise floor is essential for capturing the intricate details of an audio track, allowing you to experience true high fidelity. The M18i excels in this regard, delivering exceptional accuracy with an ultra-low noise floor of -130dB, as verified in a controlled laboratory testing environment.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m18i-lifestyle_c64b27cc-4f35-4580-9270-b36074bf1dec.webp?v=1737389042\" width=\"2048\" height=\"1365\" alt=\"Questyle M18i DAC\/amp plugged into sennheiser headphone\"\u003e\u003c\/p\u003e\n\u003ch3\u003eFull Compatibility for True Lossless Enjoyment\u003c\/h3\u003e\n\u003cp\u003eThe M18i supports lossless Bluetooth and USB DAC dual-mode switching, making it convenient for users to choose freely. It is equipped with the latest generation of Qualcomm Snapdragon Sound technology and Bluetooth 5.4.\u003c\/p\u003e\n\u003ch3\u003e3.5mm and 4.4mm Dual Ports with Gain Adjustment\u003c\/h3\u003e\n\u003cp\u003eThe M18i, equipped with (x4) current mode engines, supports 3.5mm single-ended and 4.4mm fully balanced output modes. It also features manual gain adjustment, allowing users to choose the gain mode according to personal preferences, headphone characteristics, or the audio system.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Questyle M18i DAC\/amp outputs diagram\" height=\"2048\" width=\"2048\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m18i-outputs.webp?v=1737388849\"\u003e\u003c\/p\u003e\n\u003ch3\u003eManagement System\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eMobile Mode\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIn Mobile Mode, the USB audio port is used exclusively for data transmission and does not draw power from the connected mobile device. The M18i operates entirely on its internal battery. Similarly, in Bluetooth Mode, the device relies solely on its battery for power, ensuring no external power source is required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePC Mode\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIn PC Mode, the USB audio port serves a dual purpose: transmitting data and supplying power. It charges the M18i’s battery while simultaneously powering the system.\u003c\/p\u003e\n\u003cp\u003eWhen connected to a USB host device with a current limit, the M18i intelligently manages power distribution. It prioritizes the system’s operation by ensuring stable performance, then dynamically adjusts the battery charging current based on the system’s workload and power availability. This ensures optimal performance without overloading the USB host.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Questyle M18i DAC\/amp in the box\" height=\"1365\" width=\"2048\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m18i-in-the-box.webp?v=1737389127\"\u003e\u003c\/p\u003e","brand":"Questyle","offers":[{"title":"New","offer_id":41829196759115,"sku":"QU-M18i","price":299.0,"currency_code":"USD","in_stock":true},{"title":"Open Box","offer_id":41829196791883,"sku":"QU-M18i-OB","price":349.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m18i-main-thumb.webp?v=1737388090"},{"product_id":"questyle-m18i-case","title":"Questyle Leather Protective Case for M18i | Leather DAC Case","description":"\u003cp\u003e\u003cimg style=\"display: block; margin-left: auto; margin-right: auto; width: 50%;\" alt=\"Questyle logo black\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-nhb12-logo-blk.jpg?v=1698074726\"\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eProtect your \u003ca href=\"https:\/\/bloomaudio.mom\/products\/questyle-m18i\"\u003eQuestyle M18i DAC\u003c\/a\u003e with a soft yet rugged case!\u003c\/li\u003e\n\u003cli\u003eAvailable in black\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Questyle","offers":[{"title":"Default Title","offer_id":41292011700299,"sku":"QU-M18i-CASE","price":29.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m18i-case-thumb.webp?v=1737390492"},{"product_id":"questyle-m15-case","title":"Questyle Leather Protective Case for M15i and M15C | Leather DAC Case","description":"\u003cp\u003e\u003cimg style=\"display: block; margin-left: auto; margin-right: auto; width: 50%;\" alt=\"Questyle logo black\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-nhb12-logo-blk.jpg?v=1698074726\"\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eProtect your Questyle M15i or \u003ca href=\"https:\/\/bloomaudio.mom\/collections\/questyle\/products\/questyle-m15c\"\u003eM15C\u003c\/a\u003e DAC with a soft yet rugged case!\u003c\/li\u003e\n\u003cli\u003eAvailable in black\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Questyle","offers":[{"title":"Ivory","offer_id":41251796811851,"sku":"QU-M15-CASE-IVY","price":29.0,"currency_code":"USD","in_stock":true},{"title":"Green","offer_id":41251796844619,"sku":"QU-M15-CASE-GRN","price":29.0,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":41247897878603,"sku":"QU-M15-CASE-BLK","price":29.0,"currency_code":"USD","in_stock":true},{"title":"Brown","offer_id":41251796877387,"sku":"QU-M15-CASE-BRN","price":29.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m15-case-thumb-one.webp?v=1737391562"},{"product_id":"questyle-m15-magsafe-cover","title":"Questyle MagSafe Protective Cover for M15i and M15C | Leather DAC Cover","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-nhb12-logo-blk.jpg?v=1698074726\" alt=\"Questyle logo black\" style=\"display: block; margin-left: auto; margin-right: auto; width: 50%;\"\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eProtect your Questyle M15i or \u003ca href=\"https:\/\/bloomaudio.mom\/collections\/questyle\/products\/questyle-m15c\"\u003eM15C\u003c\/a\u003e DAC with a soft yet rugged cover!\u003c\/li\u003e\n\u003cli\u003eDesigned for MagSafe use\u003c\/li\u003e\n\u003cli\u003eAvailable in black\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Questyle","offers":[{"title":"Default Title","offer_id":41247902269515,"sku":"QU-M15-MAGSAFE","price":39.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m15-cover-thumb-one.webp?v=1737392164"},{"product_id":"questyle-m15c","title":"Questyle M15C | Portable DAC and Amp","description":"\u003cp\u003e\u003cimg style=\"display: block; margin-left: auto; margin-right: auto; width: 50%;\" alt=\"Questyle logo black\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-nhb12-logo-blk.jpg?v=1698074726\"\u003e\u003c\/p\u003e\n\u003ch4\u003eThe M15C Combines Four Current Mode Amplification SiP Modules, a Cirrus Flagship USB DAC, and Manual Gain Adjustment for a Compact and Versatile Design \u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eM15C boasts near universal compatibility with any mobile device or computer\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.cirrus.com\/products\/cs43198\/\" rel=\"noopener\" target=\"_blank\"\u003eCirrus Logic Flagship CS43198\u003c\/a\u003e DAC chip\u003c\/li\u003e\n\u003cli\u003eCan handle up to PCM384kHz\/32bit and DSD256\u003c\/li\u003e\n\u003cli\u003eOptimizes power consumption to prevent premature phone battery drainage\u003c\/li\u003e\n\u003cli\u003e3.5mm and 4.4mm output with selectable gain, provides higher level of power for a wider range of headphones\u003c\/li\u003e\n\u003cli\u003eLeather \u003ca href=\"https:\/\/bloomaudio.mom\/collections\/questyle\/products\/questyle-m15-case\"\u003eprotective case\u003c\/a\u003e and leather \u003ca href=\"https:\/\/bloomaudio.mom\/collections\/questyle\/products\/questyle-m15-magsafe-cover\"\u003eMagSafe cover\u003c\/a\u003e available\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m15c-lifestyle-two.webp?v=1737399161\" width=\"2048\" height=\"1365\" alt=\"Questyle M15C DAC\/amp sitting on table with Sennheiser IEMs\"\u003e\u003c\/p\u003e\n\u003ch3\u003eAudio Innovation\u003c\/h3\u003e\n\u003cp\u003eIn a world of complexity, Questyle embraces simplicity. Their mission is to make high-fidelity audio accessible to every smartphone user, offering effortless access to lossless streaming anytime, anywhere. To meet the ever-growing demand for superior sound quality, they proudly introduce the M15C, their latest mobile DAC and headphone amplifier.\u003c\/p\u003e\n\u003cp\u003eContinuing Questyle’s legacy of high-performance audio innovation, the M15C overcomes the technical challenges of smartphone audio circuits. Equipped with four independent Current Mode Amplification SiP modules, Cirrus Logic’s flagship USB DAC, and manual gain adjustment, this compact powerhouse delivers exceptional flexibility and performance.\u003c\/p\u003e\n\u003cp\u003eWhether capturing the thunderous depth of a cathedral organ or the electrifying energy of a hard rock guitar, the M15C reveals even the finest details hidden within your favorite tracks, offering an unparalleled Hi-Fi experience on the go.\u003c\/p\u003e\n\u003cp\u003eTake the M15C with you wherever life leads—and let it elevate your journey with extraordinary sound.\u003c\/p\u003e\n\u003ch3\u003eComprehensive Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe Questyle M15C has been rigorously tested and optimized to ensure seamless compatibility with a wide range of devices, including iOS, HarmonyOS, Android 5.1 or above, macOS, and Windows 10 Version 18.3 or above. It’s completely driver-free, making setup effortless across all platforms.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m15c-diagram.webp?v=1737400222\" width=\"2048\" height=\"900\" alt=\"Questyle M15C feature diagram\"\u003e\u003c\/p\u003e\n\u003ch3\u003ePatented SiP Current Mode Amplifier\u003c\/h3\u003e\n\u003cp\u003eThe M15C contains two groundbreaking \"current mode\" patented amplification SiP modules developed by Questyle Technology. Overall, it totals four current mode amplification engines, delivering powerful and clear sound. Given that it operates in the current domain, the low impedance characteristics of the current-mode circuit result in a bandwidth of up to 1MHz and distortion as low as 0.00028%, capturing hidden details in songs.\u003c\/p\u003e\n\u003cp\u003eAs a result, the risk of overheating or interruptions during long listening sessions is extremely low thanks to the patented current mode amplification (TOREX precision power management technology) as well as the M15C's high performance and low power consumption.\u003c\/p\u003e\n\u003ch3\u003eFull Compatibility for True Lossless Enjoyment\u003c\/h3\u003e\n\u003cp\u003eDuring development, Questyle Labs conducted extensive testing and targeted optimization for M15C's compatibility with mainstream smartphones and tablets. Developers managed to achieve high compatibility with iOS, HarmonyOS, and Android versions 5.1 and above. As for PC, it supports Windows 10 18.3 and above (driver-free) as well as macOS. Hence, all HiFi headphone users can enjoy lossless audio on streaming platforms anytime, anywhere.\u003c\/p\u003e\n\u003ch3\u003e3.5mm and 4.4mm Dual Ports with Gain Adjustment\u003c\/h3\u003e\n\u003cp\u003eThe M15C, supports 3.5mm single-ended and 4.4mm fully balanced output modes. It also features manual gain adjustment, allowing users to choose the gain mode according to personal preferences, headphone characteristics, or the audio system, rendering the M15C suitable for a wide range of apps and devices.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m15C-lifestyle-four.webp?v=1737399516\" width=\"2048\" height=\"1365\" alt=\"Questyle M15C DAC\/Amp plugged into Sennheiser headphone on black background\"\u003e\u003c\/p\u003e\n\u003ch3\u003eDynamic Sampling Rate Display\u003c\/h3\u003e\n\u003cp\u003eWhen playing music, the data status indicator will light up.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA single \u003cspan style=\"color: #ff2a00;\"\u003e\u003cstrong\u003ered\u003c\/strong\u003e\u003c\/span\u003e indicator means PCM data with a sampling rate not exceeding 48kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #ff2a00;\"\u003eDual red\u003c\/span\u003e\u003c\/strong\u003e indicators indicate high-resolution playback, including PCM audio up to 384kHz or DSD audio up to DSD256\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m15c-in-the-box.webp?v=1737399253\" width=\"2048\" height=\"3000\" alt=\"Questyle M15C DAC\/Amp in the box\"\u003e\u003c\/p\u003e","brand":"Questyle","offers":[{"title":"New","offer_id":42390408331339,"sku":"QU-M15C","price":89.0,"currency_code":"USD","in_stock":true},{"title":"Open Box","offer_id":42390408364107,"sku":"QU-M15C-OB","price":89.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-m15c-thumb-three.webp?v=1737399132"},{"product_id":"questyle-qcc-dongle-pro","title":"Questyle QCC Dongle Pro | Lossless Bluetooth Transmitter","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-nhb12-logo-blk.jpg?v=1698074726\" alt=\"Questyle logo black\" style=\"display: block; margin-left: auto; margin-right: auto; width: 50%;\"\u003e\u003c\/p\u003e\n\u003ch4\u003eThe QCC Dongle and Dongle Pro Are the First Lossless Bluetooth Transmitters with Apple MFi Certification, Enabling Effortless Plug-and-Play Lossless Wireless Audio From Your Apple Devices\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eLossless Bluetooth transmitter featuring Bluetooth 5.4\u003c\/li\u003e\n\u003cli\u003e\n\u003cmeta charset=\"UTF-8\"\u003e \u003cspan\u003eSupports aptX, aptXHD, and aptXAdaptive codec technologies\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEquipped with latest generation of Qualcomm Snapdragon technology\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDedicated app for unprecedented flexibility and customization\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIdeal for listening to music or gaming for an exceptional audio experience\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"Questyle QCC Dongle pro x2 sitting right and left 3 quarter angles on black background\" height=\"1360\" width=\"2048\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-qcc-dongle-pro-banner.webp?v=1751919268\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQCC Dongle Pro\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eDue to Apple’s closed ecosystem and proprietary audio standards, its devices only support AAC and SBC codec formats, making them incompatible with Sony’s LDAC technology. As a result, when users attempt to connect LDAC-enabled devices to Apple products, the system cannot activate LDAC encoding, preventing access to the high-resolution audio LDAC provides.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eAs an official LDAC partner, Queshi Audio is dedicated to delivering a superior listening experience. The QCC Dongle Pro supports Sony’s LDAC at up to 990kbps, enabling near-lossless audio transmission and faithful reproduction of musical detail.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eWith plug-and-play simplicity, the QCC Dongle Pro allows users to connect directly to Apple devices—such as iPhone, iPad, or Mac—and pair with LDAC-compatible headphones or DACs to enjoy high-quality wireless sound with minimal setup.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eApple MFi Compatible\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eThe QCC Dongle and QCC Dongle Pro are the world’s first lossless Bluetooth transmitters to receive official Apple MFi certification. This certification ensures seamless compatibility with iPhone, iPad, and the broader Apple ecosystem, meeting Apple’s strict standards for power efficiency, device safety, and system integration.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eUnlike uncertified USB accessories, the QCC Dongle series minimizes the risk of device or system issues, delivering a safer, more reliable experience. Even as iOS updates roll out, both dongles maintain stable performance, offering users long-term peace of mind and effortless connectivity.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Questyle QCC Dongle Pro connected to iphone playing music with TWS earbuds and headphones sitting beside it on dark background\" height=\"2048\" width=\"2048\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-qcc-dongle-pro-lifestyle.webp?v=1751920088\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQualcomm Snapdragon Certified\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eQCC Dongle \u0026amp; QCC Dongle Pro are equipped with Qualcomm's latest generation Snapdragon Sound™ technology. With the ultra-high transmission speed and stability of Bluetooth 5.4, it ensures lossless sound quality and extremely low latency. It supports aptX, aptXHD, and aptXAdaptive codec technologies to bring a high-quality audio experience.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003ePlug and Play\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eQuestyle Audio Laboratory has optimized the QCC Dongle and QCC Dongle Pro for broad compatibility, addressing common issues like weak Bluetooth performance, unstable connections, and frequent dropouts. Whether you’re using a phone, tablet, or computer—on iOS, Android 5.1+, Windows, or macOS—the devices pair quickly and maintain a stable connection.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eRecognizing that many laptops either lack Bluetooth or use outdated versions, Questyle has specifically enhanced performance for notebook users. The QCC Dongle series upgrades basic Bluetooth functionality from SBC to lossless transmission, dramatically improving wireless audio quality and convenience for both music and video. On Windows 10 (version 1803 and above) and macOS, no drivers are needed, just plug and play for a high-quality wireless experience.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Questyle QCC Dongle Pro connected to Nintendo Switch in play\" height=\"1360\" width=\"2048\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-qcc-dongle-lifestyle.webp?v=1751920342\"\u003e\u003c\/p\u003e\n\u003ch3 class=\"p1\"\u003e\u003cspan\u003eSay Goodbye to Game Lag\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eThe QCC Dongle and QCC Dongle Pro effectively overcome the Bluetooth audio limitations of the PS5 and Nintendo Switch, unlocking true wireless freedom for gamers. Since the PS5 does not natively support high-quality Bluetooth audio, achieving a seamless wireless experience has traditionally been difficult.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eBy supporting aptX Adaptive, QCC Dongle and QCC Dongle Pro deliver a low-latency, high-quality wireless connection that ensures precise audio-visual synchronization, letting you clearly hear every detail and react in real time. In addition to ultra-low latency, both dongles support high-definition voice transmission for headset microphones, enabling smooth, lag-free communication with teammates and enhancing your competitive edge online.\u003c\/p\u003e\n\u003ch3 class=\"p1\"\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003eQCC Dongle Pro\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Vacuum plating\/PC+ABS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth:\u003c\/strong\u003e 5.4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransmission Distance:\u003c\/strong\u003e \u003cspan\u003e≥10m\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eAudio Coding:\u003c\/strong\u003e SBC; aptX; aptX HD; aptX Adaptive; aptX Lossless; LDAC\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eSystem Support:\u003c\/strong\u003e WinXP, Vista, Win7 8 10 11, Linux, Android, HarmonyOS, macOS, iOS\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eOperating Frequency:\u003c\/strong\u003e 2.402GHz~2.480GHZ\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003ePower Supply:\u003c\/strong\u003e USB 5V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eWorking Current:\u003c\/strong\u003e 37mA(48kHz\/24bit, LDAC)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 1\" x 0.4\" x 0.6\"\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eQCC Dongle\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Vacuum plating\/PC+ABS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth:\u003c\/strong\u003e 5.4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransmission Distance:\u003c\/strong\u003e \u003cspan\u003e≥10m\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eAudio Coding:\u003c\/strong\u003e SBC; aptX; aptX HD; aptX Adaptive; aptX Lossless\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eSystem Support:\u003c\/strong\u003e WinXP, Vista, Win7 8 10 11, Linux, Android, HarmonyOS, macOS, iOS\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eOperating Frequency:\u003c\/strong\u003e 2.402GHz~2.480GHZ\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003ePower Supply:\u003c\/strong\u003e USB 5V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eWorking Current:\u003c\/strong\u003e 33mA (48kHz\/24bit, aptX Adaptive)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 1\" x 0.4\" x 0.6\"\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eIn the Box\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eQuestyle QCC Dongle or Dongle Pro\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eUSB-A to Type-C adapter\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWarranty card\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInstructions\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Questyle","offers":[{"title":"QCC Dongle Pro","offer_id":41584109420619,"sku":"QU-QCC-DONGLE-PRO","price":99.0,"currency_code":"USD","in_stock":true},{"title":"QCC Dongle","offer_id":41584109387851,"sku":"QU-QCC-DONGLE","price":59.0,"currency_code":"USD","in_stock":true},{"title":"QCC Dongle - Open Box","offer_id":41737535684683,"sku":"QU-QCC-DONGLE-OB","price":59.0,"currency_code":"USD","in_stock":false},{"title":"QCC Dongle Pro - Open Box","offer_id":41947700035659,"sku":"QU-QCC-DONGLE-PRO-OB","price":89.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-0-qcc-dongle-pro-thumb.webp?v=1751918833"},{"product_id":"questyle-sigma","title":"Questyle Sigma | Portable DAC and Amp","description":"\u003cp\u003e\u003cimg style=\"display: block; margin-left: auto; margin-right: auto; width: 50%;\" alt=\"Questyle logo black\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-nhb12-logo-blk.jpg?v=1698074726\"\u003e\u003c\/p\u003e\n\u003ch4\u003eThe Sigma DAC\/Amp Embodies Questyle's Endless Pursuit of Audio Excellence and Innovation\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAKM AK4493 DAC\u003c\/li\u003e\n\u003cli\u003eFeatures Questyle's TTA decoding architecture \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEquipped with latest generation of Qualcomm Snapdragon technology\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eSupports dedicated IEM mode\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"Questyle Sigma DAC\/amp x2 front and back view right 3 quarter angle sitting on ledge on black background\" height=\"1360\" width=\"2048\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-sigma-banner.webp?v=1761073544\"\u003e\u003c\/p\u003e\n\u003ch3\u003eSigma\u003c\/h3\u003e\n\u003cp\u003eSigma was born from Questyle's uncompromising pursuit of excellence, featuring an innovative decoding architecture and supporting up to PCM768 and DSD512 decoding capabilities. The patented CMA technology combined with a fully-discrete, fully balanced design delivers professional-grade performance in a portable form factor. \u003c\/p\u003e\n\u003ch3\u003eRetro-Inspired LED Accents\u003c\/h3\u003e\n\u003cp\u003eThe Sigma features a precision-crafted chassis that embodies both aesthetic refinement and technical excellence. Its CNC-machined, ultra-fine sandblasted aerospace aluminum body is paired with custom optical-grade transparent glass, creating a striking visual contrast. Gradient dot-matrix detailing adds depth and sophistication, while the RF signal suppression coating ensures clean, stable performance.\u003c\/p\u003e\n\u003ch3\u003ePatented Current Mode Amplifier\u003c\/h3\u003e\n\u003cp\u003eSigma incorporates four sets of patented, fully discrete, fully balanced CMA headphone\/output amplifiers. Balancing size, power consumption, and sonic performance is the core challenge in portable audio devices. Questyle's patented Current Mode Amplifier achieves both powerful drive capability and refined sonic character. The fully discrete CMA delivers peak power up to \u0026gt;5W, peak current up to 3A, enabling exceptional dynamic drive capability. \u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Questyle Sigma DAC\/amp internal chip on black background\" height=\"1360\" width=\"2048\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-sigma-internal.webp?v=1761074071\"\u003e\u003c\/p\u003e\n\u003ch3\u003eDesktop-Level Performance\u003c\/h3\u003e\n\u003cp\u003eTo exceed customer expectations for decoding performance, Sigma uses the highly acclaimed AK4493 DAC from AKM. Additionally, it is engineered with Questyle's TTA architecture to deliver desktop-class audio performance. \u003c\/p\u003e\n\u003cp\u003eJust as only a pure black background reveals the richness of colors, only a sufficiently low noise floor allows the capture of sonic details, enabling true Hi-Fi audio. Sigma's high resolution grants it an ultra-low noise floor, achieving -130dB in Questyle's lab test environment. \u003c\/p\u003e\n\u003ch3\u003eComprehensive Compatibility\u003c\/h3\u003e\n\u003cp\u003eSigma supports high-speed USB connections with smartphones and PCs, as well as lossless Bluetooth audio. Output modes can be switched between headphone amplifier and line-out for professional monitors or Hi-Fi systems. It can also enhance PC audio quality in settlings like live concerts. Questyle Lab conducted extensive compatibility testing, ensuring full compatibility with iOS, HarmonyOS, and Android 5.1+. For PC, it supports Windows 10 1803+ (driverless) and macOS. \u003c\/p\u003e\n\u003ch3\u003eApple MFi Certification\u003c\/h3\u003e\n\u003cp\u003eSigma is officially MFi-certified by Apple, ensuring flawless compatibility with iPhone, iPad, and the broader Apple ecosystem. This certification reflects full compliance with Apple’s strict standards for power efficiency and external device performance, while safeguarding against potential risks posed by uncertified USB accessories. \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-sigma-lifestyle_478ba773-162c-4f38-ab59-82ef0f348675.webp?v=1762977653\" width=\"2048\" height=\"1360\" alt=\"Questyle Sigma DAC\/amp leaning on headphone stand with tube amp and headphones front right 3 quarter\"\u003e\u003c\/p\u003e\n\u003ch3\u003eQualcomm Snapdragon and LDAC Certification\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eSigma integrates Qualcomm’s latest-generation \u003cspan class=\"s1\"\u003eSnapdragon Sound™\u003c\/span\u003e platform with \u003cspan class=\"s1\"\u003eBluetooth 5.4\u003c\/span\u003e, earning full certification for both \u003cspan class=\"s1\"\u003eSnapdragon Sound\u003c\/span\u003e and \u003cspan class=\"s1\"\u003eSony LDAC\u003c\/span\u003e. Leveraging Qualcomm’s advanced \u003cspan class=\"s1\"\u003eaptX Adaptive\u003c\/span\u003e technology, Snapdragon Sound enables support for \u003cspan class=\"s1\"\u003eaptX HD lossless audio\u003c\/span\u003e, delivering \u003cspan class=\"s1\"\u003eCD-quality 16-bit\/44.1kHz\u003c\/span\u003e lossless streaming and \u003cspan class=\"s1\"\u003ehigh-resolution 24-bit\/48kHz–96kHz \u003c\/span\u003eaudio over Bluetooth.\u003c\/p\u003e\n\u003ch3 class=\"p1\"\u003eAdditional Features\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e3.5mm + 4.4mm Outputs\u003c\/strong\u003e\u003cbr\u003eSigma features both 3.5mm SE and 4.4mm BAL outputs. Combined with manual gain selection and output mode settings, it perfectly drives sensitive IEMs, high-impedance headphones, and Hi-Fi audio systems. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIEM Signal Processing Path\u003c\/strong\u003e\u003cbr\u003eSigma supports a dedicated IEM mode. In this mode, the signal path is minimized, and ultra-fine 64-step volume control is enabled. This ensures an optimal listening experience with sensitive in-ear monitors. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDual USB-C Ports\u003c\/strong\u003e\u003cbr\u003eDual USB-C ports allow the separation of data transfer and charging\/power.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProfessional-Grade Monitoring\u003c\/strong\u003e\u003cbr\u003eUsing a 3.5mm-to-RCA or 4.4mm-to-XLR balanced cable, music professionals can use Sigma anywhere as a high-quality interface. Connect mobile devices, PCs, or desktops to Hi-Fi equipment. \u003c\/p\u003e","brand":"Questyle","offers":[{"title":"New","offer_id":41842306941003,"sku":"QU-SIGMA","price":599.0,"currency_code":"USD","in_stock":true},{"title":"Open Box","offer_id":41958668369995,"sku":"QU-SIGMA-OB","price":599.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-0-sigma-thumb.webp?v=1761074565"},{"product_id":"questyle-sigma-pro","title":"Questyle Sigma Pro | Flagship Portable DAC and Amp","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-nhb12-logo-blk.jpg?v=1698074726\" alt=\"Questyle logo black\" style=\"display: block; margin-left: auto; margin-right: auto; width: 50%;\"\u003e\u003c\/p\u003e\n\u003ch4\u003eThe Sigma Pro is Designed to Impress, Featuring a Dual DAC Architecture, Four PCT Discrete Circuits, and Signature Tuning\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eFeatures ESS Flagship Dual Mono configuration\u003c\/li\u003e\n\u003cli\u003eStudio monitor mode + MQA-CD live decoding\u003c\/li\u003e\n\u003cli\u003ePatented Current Mode amplifier\u003c\/li\u003e\n\u003cli\u003eBuilt for professional, multi-scenario use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-sigma-pro-banner.webp?v=1762977975\" width=\"2048\" height=\"1360\" alt=\"Questyle Sigma Pro DAC\/amp lying face up on top of pink floyd dark side of the moon cover art\"\u003e\u003c\/p\u003e\n\u003cdiv class=\"bloom-take\"\u003e\n\u003ctable bgcolor=\"”#f6f6f6”\" width=\"90%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cspan style=\"color: #a30e0b;\"\u003e\u003cstrong\u003eBloom's Take\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe Questyle Sigma Pro sets a new bar for transportable DAC\/amps, delivering near-desktop performance in a refined, purpose-built chassis. Larger than a pocket DAC but still easy to carry, it prioritizes sound quality, connectivity, and flexibility over ultra-compact convenience. With a clear display, tactile volume wheel, and a wide array of digital and analog inputs, Sigma Pro feels thoughtfully engineered for serious listening anywhere.\u003c\/p\u003e\n\u003cp\u003eSonically, Sigma Pro leans clean, controlled, and highly resolving, offering excellent separation and natural timbre without drifting into sterility. It balances technical precision with musical engagement, maintaining clarity and dynamics across genres while avoiding fatigue. Multiple gain modes allow it to run quietly with sensitive IEMs while still providing ample drive for full-size headphones when needed.\u003c\/p\u003e\n\u003cp\u003eBy combining robust power, expansive connectivity, and a polished, reference-leaning sound, the Sigma Pro successfully blurs the line between portable and desktop audio. It stands out not just as a step forward for Questyle’s portable lineup, but as a compelling alternative to far more expensive DAC\/amp solutions.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/bloomaudio.mom\/blogs\/articles\/the-new-standard-in-portable-dacs-questyle-sigma-pro-review\" title=\"Questyle Sigma Pro Review\"\u003eRead our full review\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/G-EJIq2zuTo?si=cDniI_a-wIXbu5TB\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch3\u003eSigma Pro\u003c\/h3\u003e\n\u003cp\u003eSigma Pro is Questyle’s ultimate expression of portable audio innovation: where performance and portability truly converge. Designed as a technical benchmark, it brings desktop-class resolution, authority, and refinement to the palm of your hand, embodying Questyle’s relentless pursuit of sonic perfection.\u003c\/p\u003e\n\u003cp\u003eInside, four fully discrete, current-mode amplifier stages work in harmony with a dual-mono ESS ES9069 DAC array and XMOS XU316 USB interface, delivering master-grade decoding up to PCM 768kHz\/DSD512 with full MQA unfolding. Connectivity is equally versatile, with 3.5mm SE and 4.4mm BAL analog inputs, plus support for multi-machine recording and monitoring. Its chassis—milled from sandblasted aerospace aluminum and accented with Kunlun glass—houses dual USB-C ports for simultaneous charging and playback, powered by an intelligent battery system that keeps the music flowing effortlessly.\u003c\/p\u003e\n\u003ch3\u003eRetro-Tech Aesthetic\u003c\/h3\u003e\n\u003cp\u003eGuided by the Bauhaus philosophy of \"less is more,\" Sigma Pro's clean lines and geometric form remove all unnecessary ornamentation, ensuring every detail serves a precise functional purpose. \u003c\/p\u003e\n\u003cp\u003eInside, the beautiful components are on full display. The meticulously arranged circuits and gleaming chips create a mechanical work of art, fusing vintage charm with modern tech. More than just a device, Sigma Pro is a statement piece that instantly commands attention. \u003c\/p\u003e\n\u003ch3\u003eHardcore Performance\u003c\/h3\u003e\n\u003cp\u003eSigma Pro features a more powerful, fully discrete and balanced current mode amplifier, significantly increasing output power. This allows it to effortlessly drive demanding headphones for a full, dynamic sound, while also precisely controlling low-impedance IEMs. The four sets of patented amplifiers elegantly resolve the conflict between size, power, and audio performance. \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-sigma-pro-lifestyle-two.webp?v=1762978066\" width=\"2048\" height=\"1360\" alt=\"Questyle Sigma Pro DAC\/amp lying face up on wooden table closeup of inside chip next to headphone\"\u003e\u003c\/p\u003e\n\u003ch3\u003eFlagship Stereo DAC\u003c\/h3\u003e\n\u003cp\u003eTo achieve a remarkable decoding performance, the Sigma Pro utilizes ESS's flagship stereo DAC chips. Two ES9069 chips in a dual mono configuration, combined with the TTA three-level decoding architecture developed by Questyle, powers the Sigma Pro with performance on par with desktop devices. \u003c\/p\u003e\n\u003ch3\u003eQuestyle Signature Tuning\u003c\/h3\u003e\n\u003cp\u003eMeticulously tuned by Questyle, the Sigma Pro reveals the authentic essence of music. It delivers an uncolored, natural tone and presents a smooth analog warmth. The bass is deep and controlled, adding a strong sense of atmosphere and rhythm. From the grand scale of symphonies to the emotional richness of pop, Sigma Pro vividly interprets every genre, satisfying all your listening needs. \u003c\/p\u003e\n\u003ch3\u003eVersatile Connectivity and Seamless Control\u003c\/h3\u003e\n\u003cp\u003eSIGMA Pro offers 3.5mm, 4.4mm, and 6.35mm headphone outputs with manual gain adjustment, letting you tailor output power and listening modes to match different headphones and scenarios with ease. From high-sensitivity IEMs to full-size headphones, you can fine-tune performance without complex setup or software.\u003c\/p\u003e\n\u003cp\u003eSupporting optical, coaxial, USB, and analog input\/output, SIGMA Pro’s comprehensive interface lineup ensures effortless compatibility across all your audio sources. Whether connecting to players, computers, or home and professional systems, it adapts fluidly, delivering flexible status switching and mode control for a seamless, unrestricted listening experience. \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/questyle-sigma-pro-lifestyle.webp?v=1761147980\" width=\"2048\" height=\"1360\" alt=\"Questyle Sigma Pro DAC\/amp lying on recording control plugged into headphone\"\u003e\u003c\/p\u003e\n\u003ch3\u003eAdditional Features\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDual USB-C Ports\u003c\/strong\u003e\u003cbr\u003eSigma Pro supports dual USB-C ports, separating data transmission and charging. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDesigned for Music Professionals and Audiophiles\u003c\/strong\u003e\u003cbr\u003eThe rich interfaces and powerful performance allow Sigma Pro to connect to traditional Hi-Fi equipment, instantly reviving classic devices. It also allows recording and production professionals to connect to monitoring speakers an mixers anytime to start monitoring work on the spot. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQualcomm Snapdragon Sound and Sony LDAC Certified\u003c\/strong\u003e\u003cbr\u003eThe Sigma Pro is equipped with Qualcomm's latest gen of Snapdragon Sound technology, Bluetooth version 5.4, and has been fully certified by Qualcomm Sound and Sony LDAC. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApple MFi Certified\u003c\/strong\u003e\u003cbr\u003eSigma Pro is officially Apple MFi certified, ensuring seamless support for the iPhone\/iPad and the wider Apple ecosystem. 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It enables LDAC, aptX, LHDC and other high-quality wireless audio codecs, helping unlock the full performance of compatible headphones. Apple MFi certification also provides a reliable foundation for system compatibility, power management, and long-term iOS update support.\u003c\/p\u003e\n\u003ch3\u003eDesigned for Audiophiles\u003c\/h3\u003e\n\u003cp\u003eMany users already own LDAC-compatible premium headphones, but smartphones, computers, or consoles may not reliably output LDAC at up to 990kbps. 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