{"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","url":"https:\/\/bloomaudio.mom\/products\/questyle-m15i-portable-dac","provider":"Bloom Audio","version":"1.0","type":"link"}