{"title":"Fosi Audio","description":"\u003cp class=\"p1\"\u003e\u003cspan class=\"s1\"\u003eFosi Audio\u003c\/span\u003e was founded in Shenzhen, China in 2017 by Ryan Huang. They deliver high-performance HiFi products at affordable prices. Fosi's ethos is rooted in a user‑centric philosophy, co‑creating with audiophiles and building a global community.\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":"fosi-audio-k7","title":"Fosi Audio K7 | Desktop DAC and Amp","description":"\u003cp\u003e\u003cimg style=\"display: block; margin-left: auto; margin-right: auto; width: 65%;\" alt=\"fosi-audio-logo\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-logo.webp?v=1753282757\"\u003e\u003c\/p\u003e\n\u003ch4\u003eThe Fosi Audio K7 is Engineered for Precise, Immersive Sound, Perfectly Suited for Both High-Fidelity Music and Next-Level Gaming Experiences\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eGaming\/Hi-Fi desktop DAC and amp\u003c\/li\u003e\n\u003cli\u003eFeatures powerful audiophile-grade chipset\u003c\/li\u003e\n\u003cli\u003eAKM AK4493S DAC chip\u003c\/li\u003e\n\u003cli\u003eFully balanced circuitry\u003c\/li\u003e\n\u003cli\u003eComprehensive digital inputs and versatile outputs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-k7-banner.webp?v=1753285810\" width=\"2048\" height=\"1200\" alt=\"Fosi Audio K7 dac\/amp sitting front right 3 quarter angle on grey block on dark grey background\"\u003e\u003c\/p\u003e\n\u003ch3\u003eOne Device Meeting Multiple Needs\u003c\/h3\u003e\n\u003cp\u003eThe K7 is designed for audiophiles who love music and gaming. It can serve as a powerful hub for building your desktop audio system. Whether you're enjoying music, gaming, or working, the K7 can handle it all with ease.\u003c\/p\u003e\n\u003cp\u003eWith ultra-high resolution and extremely low distortion, it accurately reproduces every detail. The high-power output drives your headphones to their full potential, allowing you to enjoy the purity of music. Compatible with devices such as PC, PS5 Pro, PS5, and Switch, K7 effortlessly achieves precise audio decoding. Features like sound localization and sound effects adjustment help create an immersive gaming experience, making every battle more thrilling.\u003c\/p\u003e\n\u003ch3\u003eAudiophile-Grade Chipset\u003c\/h3\u003e\n\u003cp\u003eThe K7 integrates an audiophile-grade chipset combination including the AK4493S DAC chip, XMOS XU208 audio processing chip, TPA6120 amp chip, and OPA1612 op-amp for high resolution, wide dynamic range, ultra-low noise, low latency, and high output power. The exceptional performance will make both gaming and music listening flawless.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-k7-chipset.webp?v=1753285901\" width=\"2048\" height=\"1200\" alt=\"Fosi Audio K7 dac\/amp chipset graphic\"\u003e\u003c\/p\u003e\n\u003ch3\u003eFeature Packed\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHi-Res Bluetooth Codecs\u003c\/strong\u003e\u003cbr\u003eEquipped with the Qualcomm QCC3031 Bluetooth chip, supporting aptX HD, aptx LL, aptX, AAC, and SBC codecs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUser-Friendly and Practical Control Design\u003c\/strong\u003e\u003cbr\u003eThe K7 features a 1.5\" LCD high definition display for easy viewing. It is integrated with tactile shortcut buttons, multi-functional press-able knobs, and sits at an angled ergonomic design.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAluminum Alloy Body with CNC Design\u003c\/strong\u003e\u003cbr\u003eA compact and exquisite full-metal chassis with fine sandblasting for a robust and durable design.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTriple Intelligent Protection\u003c\/strong\u003e\u003cbr\u003eThe K7 promises uninterrupted gaming and entertainment with built-in overhear protection, overload protection, and overcurrent protection.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eComprehensive Connectivity\u003c\/strong\u003e\u003cbr\u003eSupports USB-C, coaxial, optical, Bluetooth aptX HD\/LL, and 3.5mm microphone input. Outputs include 4.4mm BAL, 3.5mm SE, and RCA, easily connecting to headphones, powered speakers or amplifiers for desktop setups.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-k7-connections.webp?v=1753285991\" width=\"2048\" height=\"900\" alt=\"Fosi Audio K7 dac\/amp comprehensive connections guide\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFully Balanced Circuitry, 0.0002% Low Distortion\u003c\/strong\u003e\u003cbr\u003eEffectively reduces noise and interference, equipped with gain control and headphone protection circuits to ensure clear, authentic audio output.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMultiple LDO Regulators\u003c\/strong\u003e\u003cbr\u003eEach stage utilizes low-noise LDO regulators for pure power output, enhancing audio performance with robust power support.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":41629028221003,"sku":"FSI-K7","price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-k7-thumb-two.webp?v=1753286644"},{"product_id":"fosi-audio-sk01","title":"Fosi Audio SK01 | Headphone Amplifier and Preamp","description":"\u003cp\u003e\u003cimg style=\"display: block; margin-left: auto; margin-right: auto; width: 65%;\" alt=\"fosi-audio-logo\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-logo.webp?v=1753282757\"\u003e\u003c\/p\u003e\n\u003ch4\u003eThe Fosi Audio SK01 is a Powerful Headphone Amp, a Customizable Analog Preamp, and An Accurate Equalizer, All-in-One Portable Device\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eIntegrated treble, middle, and bass controls with midpoint positioning\u003c\/li\u003e\n\u003cli\u003eAbundant interfaces and adjustments for personalized sound output\u003c\/li\u003e\n\u003cli\u003eCaters to both desktop and portable music listening\u003c\/li\u003e\n\u003cli\u003eUp to 6 hours of continuous usage with built-in high-capacity battery\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"Fosi Audio SK01 headphone amplifier sitting on wooden desk bottom left 3 quarter angle with iems, headphone and device plugged in\" height=\"2048\" width=\"2048\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-sk01-lifestyle.webp?v=1753299264\"\u003e\u003c\/p\u003e\n\u003ch3\u003eTailor-Made Audio Experience\u003c\/h3\u003e\n\u003cp\u003eThe Fosi Audio SK01 is a versatile headphone amplifier designed for both desktop and portable setups, offering powerful amplification and precise tone shaping. With its tri-band EQ for treble, mids, and bass, you can tailor your sound to suit your personal preferences.\u003c\/p\u003e\n\u003cp\u003eWhether used as a high-performance headphone amp, an adjustable analog preamp, or a detailed equalizer, the SK01 enhances your listening experience with refined sound and customizable character.\u003c\/p\u003e\n\u003cp\u003eAs a headphone amp, it enhances your listening with added depth and clarity. As a preamp, it delivers clean, powerful signal amplification. And as an equalizer, it fine-tunes your sound with precise control, revealing the full detail of every instrument.\u003c\/p\u003e\n\u003ch3\u003eUnmatched Headphone Compatibility\u003c\/h3\u003e\n\u003cp\u003eUnlock powerful performance and flexible connectivity with the Fosi Audio SK01. Featuring a 3.5mm line-in, 3.5mm line-out, and a combined 3.5mm\/6.35mm headphone output, the SK01 adapts to your setup with ease. With up to 2400mW RMS output at 32Ω and support for headphone impedances ranging from 16–300Ω, it delivers dynamic, high-quality sound in a compact and portable form, perfect for elevating any listening environment.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Fosi SK01 headphone amplifier connection points and functional knobs graphic\" height=\"1500\" width=\"2048\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-sk01-functions.webp?v=1753299418\"\u003e\u003c\/p\u003e\n\u003ch3\u003eAdditional Features\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eLong-Lasting Battery\u003c\/strong\u003e\u003cbr\u003eEnjoy up to 6 hours of continuous usage with the built-in high-capacity battery, while the isolated power design rejects interference, providing a pure listening experience without any interruptions.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExquisite Design\u003c\/strong\u003e\u003cbr\u003eCrafted with an aluminum alloy body, the SK01 is both elegant in appearance and touch, adding a touch of sophistication to your desktop setup.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTri-Band Control\u003c\/strong\u003e\u003cbr\u003eWith independent treble, midrange, and bass controls—plus central detents for tone bypass—dialing in the perfect balance is effortless. In high-impedance mode, the SK01 delivers up to 2400mW of powerful output.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDiverse Capabilities\u003cbr\u003e\u003c\/strong\u003eQuickly restore the original sound with a single press of the tone-defeat button. Enjoy immersive late-night listening with the loudness function, and fine-tune output for different headphones using the adjustable gain switch.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput:\u003c\/strong\u003e 3.5mm line-in\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput:\u003c\/strong\u003e 3.5mm headphone, 6.35mm headphone, 3.5mm line-out\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmp Output Max. Power\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eHigh Gain: RMS 2400mw\/ 32Ω\u003c\/li\u003e\n\u003cli\u003eLow Gain: RMS 300mw\/32Ω\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Range:\u003c\/strong\u003e 20Hz-20kHz (±0.5dB)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTHD+N:\u003c\/strong\u003e 0.001% @ 1kHz and 770mV\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSNR:\u003c\/strong\u003e ≥108dB\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeadphone Matching Impedance:\u003c\/strong\u003e 16-300Ω\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 4.76\" x 2\" x 1.69\"\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.641b\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e 5V, USB Type-C\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFosi Audio SK01 Amplifier and preamp\u003c\/li\u003e\n\u003cli\u003eUSB-A\/C to USB-C cable\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" title=\"Fosi Audio SK01 user manual\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2251\/7913\/files\/SK01_User_Manual.pdf?v=1691480635\" target=\"_blank\"\u003eUser manual\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Fosi Audio","offers":[{"title":"New","offer_id":41829175492683,"sku":"FSI-SK01","price":79.99,"currency_code":"USD","in_stock":true},{"title":"Open Box","offer_id":41829175525451,"sku":"FSI-SK01-OB","price":69.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-sk01-thumb.webp?v=1753299263"},{"product_id":"fosi-audio-mc331","title":"Fosi Audio MC331 | Desktop DAC, Tube Amp, and Preamp","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-logo.webp?v=1753282757\" alt=\"fosi-audio-logo\" style=\"display: block; margin-left: auto; margin-right: auto; width: 65%;\"\u003e\u003c\/p\u003e\n\u003ch4\u003eThe Fosi MC331 is a Versatile All-in-One DAC\/Amp That Blends Warm, Rich Tube Sound With Seamless Source Switching For an Effortless Hi-Fi Experience\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eA DAC, tube amplifier, and preamplifier with Bluetooth integration\u003c\/li\u003e\n\u003cli\u003eFeatures one analog and four digital input modes for wide compatibility\u003c\/li\u003e\n\u003cli\u003eVU meter and vacuum tubes add warm sound and a nostalgic feel\u003c\/li\u003e\n\u003cli\u003eReplaceable tube design for customizable sound signature\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"Fosi Audio MC331 sitting front right 3 quarter angle on silver stand on desk with monitor and speaker\" height=\"1360\" width=\"2048\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-mc331-lifestyle.webp?v=1753376261\"\u003e\u003c\/p\u003e\n\u003ch3\u003eAll-in-One Design\u003c\/h3\u003e\n\u003cp\u003eThe MC331 is a 2.0 channel integrated amplifier with vacuum tubes and a built-in DAC. It can play the roles as a DAC, preamp, and amplifier simultaneously in an audio system to meet various needs in one single device. The MC331 supports one analog and four digital input modes, ensuring compatibility with a broad range of audio sources. It also boasts a pre-out port, facilitating easy setup of a 2.1 system.\u003c\/p\u003e\n\u003ch3\u003eVacuum Tubes\u003c\/h3\u003e\n\u003cp\u003eAs an integrated tube DAC\/amp, the MC331 combines modern function with retro charm. The glowing 5654W vacuum tubes and VU meter add a warm, nostalgic aesthetic while also enriching the sound with smooth, analog character. The included 5725W tubes enhance musical warmth and depth and can be easily swapped with other 7-pin tubes to suit your preferences. For added safety, the unit comes with two protective tube covers to prevent accidental burns during operation.\u003c\/p\u003e\n\u003ch3\u003eSetup Flexibility\u003c\/h3\u003e\n\u003cp\u003eThe MC331 features Bluetooth, USB, coaxial, optical, and RCA inputs for broad compatibility with sources like computers, phones, CD players, and turntables with built-in phono preamps. Flexible output options include speaker terminals, a 3.5mm pre-out, and a 3.5mm headphone jack, making it easy to build and customize your ideal audio setup.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Fosi Audio MC331 DAC\/amp connections diagram graphic\" height=\"1360\" width=\"2048\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-mc331-diagram.webp?v=1753376503\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eCompact, Yet Powerful\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe MC331 only takes up minimal desktop space but boasts a maximum power output of 105Wx2@4Ω, effectively driving your bookshelf speakers. Additionally, it has a pre-out and a 3.5mm headphone output, making it versatile enough.\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eRetro Style, Modern Simplicity\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe MC331 adds nostalgic features including the VU meter and the vacuum tubes. The VU meter pointer dances to the rhythm of the music, which shows signal strength in real-time. The replaceable tube design allows you to customize the sound signature to suit your personal preferences.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe MC331 comes with a remote control, allowing you to adjust bass and treble from the comfort of your listening chair. All features can be operated either via the front panel or the remote control, including: power on\/off, mute\/unmute, play\/pause, next\/previous track, volume adjustment, input mode selection, Bluetooth pairing reset, and bass\/treble controls.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Fosi Audio MC331 DAC\/amp sitting front left 3 quarter angle on wooden cabinet with record player, speaker and lamp\" height=\"1360\" width=\"2048\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-mc331-lifestyle-one.webp?v=1753376579\"\u003e\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"New","offer_id":42393606291531,"sku":"FSI-MC331","price":129.99,"currency_code":"USD","in_stock":true},{"title":"Open Box","offer_id":42393606324299,"sku":"FSI-MC331-OB","price":129.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-mc331-thumb.webp?v=1753376885"},{"product_id":"fosi-audio-mc351","title":"Fosi Audio MC351 | 2.1 Channel Integrated Amplifier","description":"\u003cp\u003e\u003cimg style=\"display: block; margin-left: auto; margin-right: auto; width: 65%;\" alt=\"fosi-audio-logo\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-logo.webp?v=1753282757\"\u003e\u003c\/p\u003e\n\u003ch4\u003eFosi Audio Presents the MC351, An Innovative Power Amplifier That Combines High-Performance Decoding and Amplification to Meet a Wide Range of Needs\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAll-in-one DAC Amplifier\u003c\/li\u003e\n\u003cli\u003e(2x) TPA3255 Texas Instruments amp chips\u003c\/li\u003e\n\u003cli\u003eSupports 2.1 system configuration with passive subwoofer and pre-out outputs\u003c\/li\u003e\n\u003cli\u003eDual \u003cmeta charset=\"UTF-8\"\u003e \u003cspan\u003e4700μF capacitors for enhanced sound quality\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eIdeal for home theatre and HiFi listening\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-mc351-banner.webp?v=1753381785\" width=\"2048\" height=\"1200\" alt=\"Fosi Audio MC351 amplifier sitting front view on wooden vinyl storage cabinet with record player and white bookshelf speakers\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e2.1 Channel Integrated Amplifier\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe Fosi Audio MC351 is a high-performance integrated amplifier with a built-in DAC and support for Bluetooth, USB, optical, and coaxial digital inputs. Its versatile connectivity and outputs for passive subwoofer and pre-out make it ideal for configuring a 2.1 system or stereo Hi-Fi setup. A circular VU meter adds vintage charm, combining retro visuals with rich, detailed sound for a complete listening experience.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eDual Amp Chips for High Power Output\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eEquipped with two high-end Texas Instruments TPA3255 Class-D amplifier chips and a 100-fin heatsink, the MC351 can stably output up to 165W x 2 + 350W power in a 2.1 channel setup. The dual PCBA separated design ensures that the input and output signals do not interfere with each other, providing you with the purest and most impeccable sound quality.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-mc351-amp-chips.webp?v=1753381868\" width=\"2048\" height=\"1360\" alt=\"Fosi Audio MC351 amplifier dual amp chips graphic\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eUser-Friendly Control\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eThe MC351 offers one-touch switching between five input modes and intuitive bass and treble controls with center detents for tone bypass. An auto-standby function reduces power consumption by entering standby after two minutes of inactivity. Input settings are saved and automatically restored on restart, making sound customization effortless and efficient.\u003c\/p\u003e\n\u003ch3\u003eExquisite Craftsmanship and Vintage Charm\u003c\/h3\u003e\n\u003cp\u003eCrafted from CNC-machined aluminum alloy with a finely sandblasted finish, the MC351 features a seamless, screw-free design that exudes minimalist elegance. A round mini VU meter adds a charming retro touch—its needle dances with the music, enhancing the listening experience with visual flair. Ideal for turntables, the MC351 brings vintage warmth to your favorite classic tracks.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":41632695681099,"sku":"FSI-MC351","price":189.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-mc351-thumb-one.webp?v=1753382013"},{"product_id":"fosi-audio-gr70","title":"Fosi Audio GR70 | Tube Headphone Amplifier and Preamp","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-logo.webp?v=1753282757\" alt=\"fosi-audio-logo\" style=\"display: block; margin-left: auto; margin-right: auto; width: 65%;\"\u003e\u003c\/p\u003e\n\u003ch4\u003eThe Fosi Audio GR70 Features a Thoughtfully Selected Vacuum Tube Combination For a Highly Musical and Authentic Analog Sound\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDesktop vacuum tube headphone amp and preamp\u003c\/li\u003e\n\u003cli\u003eGeneral Electric 5654W and Sovtek 6Ж4 replaceable tubes\u003c\/li\u003e\n\u003cli\u003eFeatures adjustable impedance, bass and treble control\u003c\/li\u003e\n\u003cli\u003eSupports 16-\u003cmeta charset=\"UTF-8\"\u003e \u003cspan\u003e300Ω headphone impedance\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"Fosi Audio GR70 tube headphone amp sitting front right 3 quarter angle on wooden desk with bookshelf speaker behind, over ear headphones, iphone and keyboard next to it\" height=\"1360\" width=\"2048\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-gr70-banner.webp?v=1753714915\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQuad-Tube Dual Amplification\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eBuilt with two replaceable General Electric 5654W and two Sovtek 6Ж4 vacuum tubes, the Fosi GR70 amp offers a customizable auditory experience. Immerse yourself in the authentic warmth and smoothness of analog audio. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"UTF-8\"\u003eThe 5654W tubes boost voltage, while the 6Ж4 tubes handle power amplification. This setup delivers balanced, transparent, and textured sound.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eVintage Charm with Modern Precision\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe GR70 is a two-in-one headphone amp and preamp. Easily integrate this tube preamp into your home audio system with its multiple headphone jacks and RCA input\/output options. This tube headphone amp preamplifier offers intuitive controls, including a large volume knob, dual-side ventilation holes, bass\/treble controls, and high + low impedance mode switching.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eAdditional Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSwitchable Output Impedance\u003c\/strong\u003e\u003cbr\u003eEnsures optimal control and cleaner sound across a wide range of full-size headphones and IEMs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eEfficient Cooling and Thermal Stability\u003c\/strong\u003e\u003cbr\u003eKeeps dust out while maintaining airflow to protect internal components.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eCompact, Yet Powerful\u003c\/strong\u003e\u003cbr\u003eCrafted with a CNC-machined aluminum alloy body, the GR70 is both durable and refined. Despite its compact size, it delivers up to 300mW power output and 1.2V RCA output with SNR ≥97dB—offering warm, clean, and dynamic sound.\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTwo-in-One\u003c\/strong\u003e\u003cbr\u003e\u003cmeta charset=\"UTF-8\"\u003eIt supports low and high impedance modes switching to adapt 16Ω-300Ω headphones, and features 6.35mm\/3.5mm headphone jacks on the front and RCA Input\/Output on the rear for home audio HiFi system integration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Fosi Audio GR70 tube amp connections diagram\" height=\"1500\" width=\"2048\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-gr70-connections.webp?v=1753714778\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eInput:\u003c\/strong\u003e RCA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eOutput:\u003c\/strong\u003e RCA, 6.35mm headphones, 3.5mm headphones\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Power Output\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eLow Gain: 67mW\/32Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHigh Gain: 830mW\/32Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeadphone Impedance\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eLow Impedance Mode: 16Ω-120Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHigh Impedance Mode: 120Ω-300Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 20Hz-20kHz (±1dB)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eSNR:\u003c\/strong\u003e ≥93dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eDynamic Range:\u003c\/strong\u003e 94dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTHD\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eRCA OUT: ≤0.26%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePHONE: ≤0.5%\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNoise Floor\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eRCA OUT: ≤20uV\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePHONE: 56uV\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross Talk\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eRCA OUT: -63dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePHONE: -65dB\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003ePower Input:\u003c\/strong\u003e DC 12V\/3A\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\u003eFosi Audio GR70 Tube Amp\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e(2x) 6Ж4 Vacuum Tube\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e(2x) 5654W Vacuum Tube\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e12V\/3A power supply\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e(2x) Tube cover\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/GR70_User_Manual.pdf?v=1753714299\" title=\"Fosi Audio GR70 Amp user manual\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan\u003eUser manual\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":41640162263115,"sku":"FSI-GR70","price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-gr70-thumb.webp?v=1753714620"},{"product_id":"fosi-audio-zd3","title":"Fosi Audio ZD3 | Fully Balanced Desktop DAC","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-logo.webp?v=1753282757\" alt=\"fosi-audio-logo\" style=\"display: block; margin-left: auto; margin-right: auto; width: 65%;\"\u003e\u003c\/p\u003e\n\u003ch4\u003eThe Fosi Audio ZD3 Delivers Refined DAC Performance With Effortless Usability, Offering Superior Audio Quality Tailored For Pure Listening Enjoyment\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eFully balanced flagship desktop DAC preamp\u003c\/li\u003e\n\u003cli\u003eBuilt with high-performance ESS ES9039Q2M chip\u003c\/li\u003e\n\u003cli\u003eSwappable op-amp design\u003c\/li\u003e\n\u003cli\u003eOffers comprehensive connectivity options\u003c\/li\u003e\n\u003cli\u003eLossless wireless streaming\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-zd3-banner.webp?v=1753721918\" width=\"2048\" height=\"1000\" alt=\"Fosi Audio ZD3 DAC sitting on 2 channel setup with speakers on either side in livingroom\"\u003e\u003c\/p\u003e\n\u003ch3\u003eFlagship Chipset\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe ZD3 is an audiophile-grade balanced stereo DAC meticulously developed by Fosi Audio. The XMOS XU316 chip provides precise digital signal processing, paired with the ESS 9039Q2M decoding chip to ensure ultimate audio detail and precision. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Qualcomm QCC 3031 chip enhances connectivity and signal stability, while the LME49720 operational amplifier greatly improves audio clarity and dynamic range. Whether for music or movies, it delivers an immersive high-fidelity audio experience to users.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-zd3-chipset.webp?v=1753721707\" width=\"2048\" height=\"2048\" alt=\"Fosi Audio ZD3 DAC chipset graphic\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eBalanced Circuit Design\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe fully discrete balanced circuit design effectively reduces electronic noise and signal crosstalk, ensuring pure and clear audio output. Professional-grade balanced XLR output support further enhances signal stability and audio fidelity, making it suitable for demanding audio applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eMultiple Inputs + Outputs\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe ZD3 supports USB, HDMI (ARC), coaxial, optical, and Bluetooth inputs, easily \u003c\/span\u003eaccommodating both traditional and modern digital sources. It also offers RCA and XLR outputs, making it an ideal choice for connecting a variety of audio equipment, providing exceptional flexibility and broad applicability.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-zd3-connections_0cb7d9c7-8848-48e0-96d0-4589312a3d55.webp?v=1753722100\" width=\"2048\" height=\"1500\" alt=\"Fosi Audio ZD3 DAC connection and usage diagram\"\u003e\u003c\/p\u003e\n\u003ch3\u003eAdditional Features\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSwappable Op-Amp Design\u003c\/strong\u003e\u003cbr\u003eEasily replaceable DIP8 dual discrete op-amps, meeting your pursuit of a personalized audio experience, such as LME49720, NE5532, MUSES02, SS3602.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBypass Mode\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe signal bypasses the internal preamp section, providing a fixed output level for direct signal transmission.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTrigger In\/Out\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eEnables synchronized on\/off across your audio setup, automating system control for seamless operation.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFront Panel OLED Display\u003c\/strong\u003e\u003cbr\u003eOffers clear visibility, allowing users to easily monitor device status and settings in real-time.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"New","offer_id":42091509809227,"sku":"FSI-ZD3","price":179.99,"currency_code":"USD","in_stock":true},{"title":"Open Box","offer_id":42091509841995,"sku":"FSI-ZD3-OB","price":159.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-zd3-thumb.webp?v=1753721593"},{"product_id":"fosi-audio-i5","title":"Fosi Audio i5 | Open-Back Planar Magnetic Headphones","description":"\u003cp\u003e\u003cimg style=\"display: block; margin-left: auto; margin-right: auto; width: 65%;\" alt=\"fosi-audio-logo\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-logo.webp?v=1753282757\"\u003e\u003c\/p\u003e\n\u003ch4\u003eCrafted With an Ultra-Thin Diaphragm, High-powered Magnetic System, and a Precision Acoustic Design, the i5 Delivers a Truly Likelife Listening Experience\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eOpen-back planar magnetic headphones\u003c\/li\u003e\n\u003cli\u003e97mm large driver with ultra-thin 2-micron diaphragm\u003c\/li\u003e\n\u003cli\u003e44 High-strength N50 neodymium magnets for driver efficiency\u003c\/li\u003e\n\u003cli\u003eSuede leather headband, walnut wood frame with unique natural grain, and CNC-machined aluminum frame\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"Fosi Audio i5 planar headphones left earcup closeup whitebox\" height=\"2048\" width=\"2048\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-2-i5-thumb.webp?v=1753726482\"\u003e\u003c\/p\u003e\n\u003ch3\u003e97mm Large-Diaphragm Driver\u003c\/h3\u003e\n\u003cp\u003eThe i5 is equipped with a massive 97mm driver and an ultra-thin 2-micron diaphragm, delivering exceptionally low distortion. The expansive surface area enhances resolution, dynamic impact, and transient speed, producing a remarkably natural and immersive listening experience.\u003c\/p\u003e\n\u003ch3\u003eTarget Sputtering Technology\u003c\/h3\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eUtilizing advanced targeted sputtering technology, a highly conductive silver metal voice coil as thin as 1.3μm is precisely coated onto the diaphragm. This process significantly enhances sound refinement while ensuring durability, keeping excellent audio performance consistently stable over time.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eAcoustic Mesh\u003c\/h3\u003e\n\u003cp\u003eThe high-transparency rigid rear mesh structure provides stable air pressure damping and linear feedback. It smooths out frequency spikes and reduces nonlinearity, achieving an open, airy soundstage with ultra-low acoustic resistance. \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-i5-magnetic-matrix.webp?v=1753726028\" width=\"2048\" height=\"1200\" alt=\"Fosi Audio i5 planar headphones symmetrical magnetic matrix graphic\"\u003e\u003c\/p\u003e\n\u003ch3\u003eHigh-Strength N50 Neodymium Magnets\u003c\/h3\u003e\n\u003cp\u003eEach driver unit features 22 pieces of N50-grade neodymium magnets arranged symmetrically, ensuring precise and stable diaphragm vibration. This design enables accurate and swift dynamic response, effectively reducing nonlinear distortion to produce purer, more natural sound, faithfully reproducing the essence of music. \u003c\/p\u003e\n\u003ch3\u003eErgonomic Comfort\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBreathable, Skin-Friendly Earpads:\u003c\/strong\u003e Soft, ventilated materials reduce pressure and heat buildup, promising long-term comfort.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDual-Axis Earcup Arms:\u003c\/strong\u003e Allows seamless vertical and horizontal rotation for a custom fit to different head shapes, enhancing both comfort and stability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMemory Metal Headband:\u003c\/strong\u003e Flexible yet durable, it maintains its shape while adapting to different head sizes for a secure fit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStepless Silicone Adjustment:\u003c\/strong\u003e Enables smooth, precise adjustments for a personalized and comfortable wearing experience.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"New","offer_id":41847288823883,"sku":"FSI-i5","price":549.99,"currency_code":"USD","in_stock":true},{"title":"Open Box","offer_id":41847288856651,"sku":"FSI-i5-OB","price":489.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-0-i5-thumb.webp?v=1753726482"},{"product_id":"fosi-audio-im4","title":"Fosi Audio IM4 | Dynamic Universal Open-Back IEMs","description":"\u003cp\u003e\u003cimg style=\"display: block; margin-left: auto; margin-right: auto; width: 65%;\" alt=\"fosi-audio-logo\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-audio-logo.webp?v=1753282757\"\u003e\u003c\/p\u003e\n\u003ch4\u003eFosi Audio Enters the World of IEMs with the IM4, Delivering Rich Musical Detail with an Open-Back Design\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e10mm PU Beryllium-coated diaphragm\u003c\/li\u003e\n\u003cli\u003eDual-chamber acoustic design\u003c\/li\u003e\n\u003cli\u003ePowerful N52 dual-magnet for control and speed\u003c\/li\u003e\n\u003cli\u003eIncludes OFC Silver-plated cable\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-im4-banner.webp?v=1761252732\" width=\"2048\" height=\"1200\" alt=\"Fosi Audio IM4 iems front center on black orange background\"\u003e\u003c\/p\u003e\n\u003ch3\u003eFosi's First IEM\u003c\/h3\u003e\n\u003cp\u003eThe name \"IM4\" reflects the phrase \"I am for,\" a declaration of support, advocacy, and identity. It is open-ended, inviting participation inside and out in both aesthetics and sound. \u003c\/p\u003e\n\u003cp\u003eThe IM4 features an open-back acoustic design and a 10mm beryllium-coated diaphragm driver, delivering a spacious soundstage and musical detail, a true reflection of Fosi's brand spirit: Hear the Unheard. Their tuning team aimed to create a balanced, relaxed, and versatile listening experience.\u003c\/p\u003e\n\u003ch3\u003eHigh-Fidelity Sound\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e10mm PU Beryllium-Coated Diaphragm\u003c\/strong\u003e\u003cbr\u003ePU ensures smooth mids and punchy lows, while the beryllium coating adds clarity and sparkle to high frequencies.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eN52 Dual-Magnet\u003c\/strong\u003e\u003cbr\u003eA powerful, stable magnetic field improves control and speed, delivering cleaner sound with better dynamics.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDual-Chamber Acoustic Design\u003c\/strong\u003e\u003cbr\u003eThe front chamber's nine-port design ensures balanced frequencies, while the rear chamber extends treble detail. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOFC Silver-Plated Cable\u003c\/strong\u003e\u003cbr\u003eBraided with 4 strands of 392-core 5N high-purity OFC silver-plated wire, the cable offers excellent signal transmission and shielding for richly detailed sound. \u003c\/p\u003e\n\u003ch3\u003eEffortless Acoustics with Natural Flow\u003c\/h3\u003e\n\u003cp\u003eThe open-back design of IM4 minimizes internal reflections and pressure buildup, creating a more open, natural sound with reduced fatigue. The rear chamber is filled with acoustic damping material to absorb standing waves, reducing distortion and harshness. The IM4 was tuned with listener feedback to ensure smooth, balanced sound across genres. \u003c\/p\u003e\n\u003ch3\u003eComfortable Fit\u003c\/h3\u003e\n\u003cp\u003eDeveloped with insights from millions of hearing-aid fitting samples, the ergonomic housing adapts to diverse ear shapes, delivering a secure and seamless fit. Crafted from CNC-machined aluminum alloy, IM4 offers a smooth touch that's gentle on the skin. The hollowed structure cuts the weight to just 38g, providing pressure-free comfort for long listening. \u003c\/p\u003e\n\u003ch3\u003eSwappable Components\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSound Nozzles\u003c\/strong\u003e\u003cbr\u003eComes with both aluminum alloy and brass nozzles. Aluminum reduces sibilance with added brass; brass enhances mids and treble with clarity. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTuning Ear Tips\u003c\/strong\u003e\u003cbr\u003eIncludes three tuning sets: balanced, bass, and deep bass. Each available in S\/M\/L sizes. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2-Pin 0.78mm Cable\u003c\/strong\u003e\u003cbr\u003eThe detachable 2-pin design supports 3.5mm and 4.4mm cable upgrades, allowing flexible customization. \u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Silver","offer_id":41844993654859,"sku":"FSI-IM4-SLV","price":99.99,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":41844993687627,"sku":"FSI-IM4-BLK","price":99.99,"currency_code":"USD","in_stock":true},{"title":"Black - Open Box","offer_id":42203940454475,"sku":"FSI-IM4-BLK-OB","price":89.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/fosi-im4-thumb.webp?v=1761252535"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/collections\/fosi-audio-logo.webp?v=1753728999","url":"https:\/\/bloomaudio.mom\/collections\/fosi-audio.oembed","provider":"Bloom Audio","version":"1.0","type":"link"}