{"title":"Fosi Audio","description":"\u003cp\u003eShop Fosi Audio at Audio46. \u003cstrong\u003e\u003ca href=\"javascript:;\" onclick=\"tidioChatApi.display(true);tidioChatApi.open()\"\u003eLive chat\u003c\/a\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003ca href=\"mailto:info@audio46.mom\"\u003eemail us\u003c\/a\u003e\u003c\/strong\u003e, or call \u003ca href=\"tel:212-354-6424\"\u003e(212) 354-6424\u003c\/a\u003e during store hours if you need help.\u003c\/p\u003e","products":[{"product_id":"fosi-audio-k7-desktop-dac-headphone-amplifier","title":"Fosi Audio K7 Desktop DAC Headphone Amplifier","description":"\u003ch2\u003e\n\u003cstrong\u003eHiFi and Gaming,\u003c\/strong\u003e\u003cstrong\u003eOne Device Meets Multiple Needs\u003c\/strong\u003e\n\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"Hifi And Gaming Setup\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/K7-1500x1000_a6ccde14-44ce-451b-86a5-92fec94d020f_copy.jpg?v=1755285227\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003ePure Music Enjoyment\u003c\/strong\u003e\u003c\/h3\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.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cimg alt=\"Gaming Set Up\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/gempages_477252102637224875-00ddd056-db07-4d1c-ac21-e36ed4745d99_copy.jpg?v=1755285298\"\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cstrong\u003eGaming Entertainment\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eCompatible with devices such as PC, PS5 Pro, PS5, and Switch, it 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\u003e\u003cstrong\u003e\u003cimg alt=\"K7's Chipset\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/gempages_477252102637224875-cafe19ef-a104-4a0d-9cca-6e839f8e19e0_copy.jpg?v=1755285290\"\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cstrong\u003eAudiophile-Grade Chipset\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eFor high resolution, wide dynamic range, ultra-low noise, low latency, and high output power. Captures more details for a flawless and pure listening experience\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Comprehensive Digital Inputs with Versatile Outputs\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/Screenshot_2025-08-15_at_1.48.16_PM.jpg?v=1755280258\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3.5mm\u003c\/strong\u003e\u003cstrong\u003eSingle-Ended Headphone Output \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRated Power\u003c\/p\u003e\n\u003cp\u003e≥600mW+600mW @32Ω\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4.4mm\u003c\/strong\u003e\u003cstrong\u003eBalanced Headphone Output\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRated Power≥2.1W+2.1W @32Ω\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3.5mm\u003c\/strong\u003e\u003cstrong\u003eMicrophone Input\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIntelligent Noise Reduction for Clearer Communications\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003eHi-Res\u003c\/strong\u003e \u003cstrong\u003eBluetooth Codecs\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003eEquipped with the Qualcomm QCC3031 Bluetooth chip, supporting aptX HD, aptX LL, aptX, AAC, and SBC codecs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUnder 40 ms\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eImperceptible latency\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLossless PCM 24bit\/48kHz \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSampling Rate\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003e1.5-Inch LCD\u003c\/strong\u003e \u003cstrong\u003eHigh Definition Display\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003cimg alt=\"K7's Display\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/gempages_477252102637224875-7b77b126-fc34-4e1b-b7e0-18e57c287b54.jpg?v=1755280569\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003eUser-Friendly and\u003c\/strong\u003e \u003cstrong\u003ePractical Control Design\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg alt=\"K7_Diagram\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/K7_Diagram.jpg?v=1755282488\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003eAll-Aluminum Alloy Body, \u003c\/strong\u003e\u003cstrong\u003ewith CNC Integrated Design\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003eA compact and exquisite full-metal chassis with fine sandblasting, robust and durable\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003eTriple Intelligent Protection,\u003c\/strong\u003e\u003cstrong\u003eUninterrupted Gaming and Entertainment\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003ch3\u003e\n\u003cstrong\u003eFully Balanced Circuitry,\u003c\/strong\u003e\u003cstrong\u003e0.0002% Ultra-Low Distortion\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003eEffectively reduces noise and interference, equipped with gain control and headphone protection circuits to ensure clear, authentic audio output, enhancing your listening experience\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003eMultiple LDO Regulators\u003c\/strong\u003e\u003cstrong\u003eEnsuring Clear Sound Quality\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003eEach stage utilizes low-noise LDO regulators for pure power output, enhancing audio performance with robust power support\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eApplication Scenarios\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg alt=\"Application 1\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/gempages_477252102637224875-3e03357a-eb33-4174-bf45-421f9194210a.jpg?v=1755282688\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg alt=\"Application 2\" 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Version\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e5.0\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBluetooth Connection Distance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e≤13m\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNoise Floor\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e≤2.5μV\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBluetooth Transmission Audio Format\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSBC, AAC, aptX, aptX HD, aptX LL\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInput Voltage and Current\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDC 12V 2A\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUSB Compatible Devices\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWindows 7,8, 8.1,10,11 (Driver required)\u003c\/p\u003e\n\u003cp\u003eMac OS X, Linux (No driver required)\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eAudio Parameters\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e-4.4mm Balanced Headphone Output\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRated Power Output\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eL+R≥2100mW+2100mW (32Ω\/THD+N＜1%)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSNR\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e121dB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTHD+N\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u0026lt;0.0002%\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDynamic Range\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e121dB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNoise Floor\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e≤ 6.5μV\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e-3.5mm Single-Ended Headphone Output\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRated Power Output\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eL+ R≥600mW+600mW (32Ω\/THD+N\u0026lt;1%)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSNR\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e122dB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTHD+N\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e0.0005%\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDynamic Range\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e121dB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNoise Floor\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e≤2.5μV\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e20Hz-20kHz (±0.1dB)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e-RCA Output\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Level\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e≥2Vrms\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSNR\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e20Hz-20kHz (±0.1dB)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTHD+N\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e0.0005%\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDynamic Range\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e121dB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNoise Floor\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e≤3μV\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e20Hz-20kHz\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003ePacking List\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFosi Audio K7\u003c\/li\u003e\n\u003cli\u003eUSB-A\/C to USB-C Cable\u003c\/li\u003e\n\u003cli\u003eBluetooth Antenna\u003c\/li\u003e\n\u003cli\u003eDC 12V Power Supply\u003c\/li\u003e\n\u003cli\u003e3.5mm Headphone Splitter\u003c\/li\u003e\n\u003cli\u003eUser Manual\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":48949853847785,"sku":"K7","price":199.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/K7_9c69ba5b-cd28-400d-a7fe-e560070f39d4copy.jpg?v=1755285612"},{"product_id":"fosi-audio-i5-open-back-planar-magnetic-headphones","title":"Fosi Audio i5 Open-Back Planar Magnetic Headphones","description":"\u003ch2\u003eHiFi Headphones for Passionate Audiophiles\u003c\/h2\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e97mm Diaphragm\u003c\/li\u003e\n\u003cli\u003eWalnut Wood\u003c\/li\u003e\n\u003cli\u003eMagnetic Array\u003c\/li\u003e\n\u003cli\u003eAluminum Frame\u003c\/li\u003e\n\u003cli\u003eSputtered Coating\u003c\/li\u003e\n\u003cli\u003eDetachable Cables\u003c\/li\u003e\n\u003cli\u003eGenuine Suede\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\n\u003cstrong\u003eImmersive Listening\u003c\/strong\u003e \u003cstrong\u003ePure Original Sound\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003eCrafted with an ultra-thin diaphragm using nano-level technology, an invisible high-powered magnetic system, and precision acoustic design, the i5 delivers high resolution and low distortion for a truly lifelike listening experience.\u003c\/p\u003e\n\u003ch3\u003e97mm Ultra-Large Diaphragm\u003c\/h3\u003e\n\u003cp\u003eThe ultra-thin diaphragm, crafted with nano-level precision, delivers faster response, enhanced detail, and a more natural, clear, and layered sound.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"i5's Diaphragm\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/gempages_477252102637224875-47c9ca79-0a50-4450-a2b6-711655950602.jpg?v=1755286751\"\u003e\u003c\/p\u003e\n\u003ch3\u003eSputtered Coating Technology\u003c\/h3\u003e\n\u003cp\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\/p\u003e\n\u003cp\u003e\u003cimg alt=\"i5's Sputtered Coating\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/gempages_477252102637224875-2db2efdd-814b-44b2-a158-96af9e804cf5.jpg?v=1755286873\"\u003e\u003c\/p\u003e\n\u003ch3\u003eSymmetrically Arranged High-Strength Magnetic Matrix\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\u003cp\u003e\u003cimg alt=\"Magnetic Array\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/gempages_477252102637224875-61fe5c00-ad26-48c4-b823-6b87b07a7bee.jpg?v=1755286962\"\u003e\u003c\/p\u003e\n\u003ch3\u003eRigid High-Transparency Acoustic 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 alt=\"Acoustic Mesh\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/gempages_477252102637224875-097342e0-67bc-4141-9406-015a168f3fe7.jpg?v=1755287032\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003eErgonomic Design\u003c\/strong\u003e \u003cstrong\u003eLong-Lasting Comfort\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003eDesigned to follow the natural contours of the head, the i5 ensures a secure yet gentle fit. Even during extended listening sessions, it remains comfortable and pressure-free, letting you enjoy your music without distraction.\u003c\/p\u003e\n\u003ch3\u003eDual-Axis Ear Cup Arms\u003c\/h3\u003e\n\u003cp\u003eAllows seamless vertical and horizontal rotation for a custom fit to different head shapes, enhancing both comfort and stability.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"gempages_477252102637224875-d1679a78-5451-48c8-a18d-ef3d07f2af9b\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/gempages_477252102637224875-d1679a78-5451-48c8-a18d-ef3d07f2af9b.jpg?v=1755287189\"\u003e\u003c\/p\u003e\n\u003ch3\u003eStepless Silicone Adjustment\u003c\/h3\u003e\n\u003cp\u003eThe headband features a silicone adjustment slider with a damped, smooth feel, enabling easy and precise positioning based on personal preference.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"gempages_477252102637224875-7618d036-a76a-4bb2-844a-1d10418956a4\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/gempages_477252102637224875-7618d036-a76a-4bb2-844a-1d10418956a4.jpg?v=1755287249\"\u003e\u003c\/p\u003e\n\u003ch3\u003eDurable Memory Metal Headband\u003c\/h3\u003e\n\u003cp\u003eMade of high-strength memory metal, the headband maintains its shape over time. Lightweight and flexible, it reduces pressure and enhances comfort.\u003c\/p\u003e\n\u003ch3\u003eBreathable Skin-Friendly Earpads\u003c\/h3\u003e\n\u003cp\u003eCrafted with perforated leather and breathable fabric, the earpads stay cool and soft. Memory foam inside ensures all-day comfort without overheating.\u003c\/p\u003e\n\u003ch3\u003eRefined Craftsmanship, Where Aesthetics Meet Quality\u003c\/h3\u003e\n\u003cp\u003eA refined fusion of premium materials and elegant design, delivering a look that exudes sophistication, texture, and distinctive character.\u003c\/p\u003e\n\u003ch3\u003eGenuine Suede Leather Headband\u003c\/h3\u003e\n\u003cp\u003eSoft and refined for a more comfortable fi\u003c\/p\u003e\n\u003ch3\u003eLuxurious Walnut Wood Frame\u003c\/h3\u003e\n\u003cp\u003eEach pair features a unique natural grain.\u003c\/p\u003e\n\u003ch3\u003eCNC-Machined Aluminum Frame\u003c\/h3\u003e\n\u003cp\u003eLightweight yet sturdy with a metallic finish\u003c\/p\u003e\n\u003ch3\u003eS-Shaped Decorative Accent\u003c\/h3\u003e\n\u003cp\u003eElegant and flowing, inspired by musical notes\u003c\/p\u003e\n\u003ch3\u003eDetachable Cable Design\u003c\/h3\u003e\n\u003cp\u003eThe i5 features a detachable cable design with standard 3.5mm connectors on both sides, and is compatible with our available 3.5mm and 4.4mm headphone cables.\u003c\/p\u003e\n\u003ch2\u003eWhat‘s in the box？\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ei5 Headphone\u003c\/li\u003e\n\u003cli\u003e6.35mm Adaptor\u003c\/li\u003e\n\u003cli\u003e3.5mm Cable\u003c\/li\u003e\n\u003cli\u003eUser Manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecification\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDevice Type\u003c\/td\u003e\n\u003ctd\u003eOpen-Back Wired Headphones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransducer Type\u003c\/td\u003e\n\u003ctd\u003ePlanar Magnetic Drivers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Sound Pressure Level\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;120 dBSPL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Response\u003c\/td\u003e\n\u003ctd\u003e10Hz - 50kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTHD\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 1% @100 dBSPL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensitivity\u003c\/td\u003e\n\u003ctd\u003e98dB\/mW @ 1kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Impedance\u003c\/td\u003e\n\u003ctd\u003e28Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Power\u003c\/td\u003e\n\u003ctd\u003e≥ 500mW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Recommended Power\u003c\/td\u003e\n\u003ctd\u003e100mW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e550g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":48950006055145,"sku":"i5","price":549.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/fosi-audio-0-i5-thumb.png?v=1755288316"},{"product_id":"fosi-audio-mc331-tube-integrated-bluetooth-amplifier-with-dac-and-vu-meter","title":"Fosi Audio MC331 Tube Integrated Bluetooth Amplifier with DAC and VU Meter","description":"\u003ch2\u003eMini Nostalgic Aesthetics\u003c\/h2\u003e\n\u003cp\u003eCompact size, tube warmth, and remote control: A perfect combination for convenient and cozy audio enjoyment.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"MC331 In A Desktop Set Up\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/002_e725bdaf-a000-4fb6-abf7-b37306e0e87e.jpg?v=1755296208\"\u003e\u003c\/p\u003e\n\u003ch3\u003eAll-in-One DAC Amp\/Headphone Amp\u003c\/h3\u003e\n\u003cp\u003eThe 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. The VU meter and vacuum tubes add a touch of retro flair, delighting audio enthusiasts with both visual and auditory pleasure.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInput: RCA, Bluetooth, USB, Optical, Coaxial\u003c\/li\u003e\n\u003cli\u003eOutput: Passive Speakers Output, Pre-Out, 3.5mm Headphone\u003c\/li\u003e\n\u003cli\u003eOutputSNR≥100dB; THD≤0.03%; Bluetooth Codecs: SBC, AAC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"005-1_62da6046-ce45-4e98-a874-4e49e6b423bd\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/005-1_62da6046-ce45-4e98-a874-4e49e6b423bd.jpg?v=1755296495\"\u003e\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eHybrid Tube Integrated Amplifier\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMaximize Space Efficiency\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eJAN 5654W Vacum Tubes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCustomize Your Unique Sound\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMemory Function\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll-in-One DAC Amp:\u003c\/strong\u003e A DAC, amplifier, preamplifier, and headphone amplifier are all integrated into the Fosi Audio MC331. You can easily switch between audio sources with the help of the remote control, ensuring a seamless and enriched listening experience.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmazing Combination: \u003c\/strong\u003eAs an integrated tube DAC amp with a VU meter, the visual aesthetics of the 5654W vacuum tubes and VU meter add a nice warm and soft effect to not only the appearance but the sound as well, giving the modern look a retro feel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSetup Flexibility: \u003c\/strong\u003eIt supports Bluetooth, USB, coaxial, optical, and RCA inputs, making it compatible with a variety of sources such as computers, phones, CD players, turntables with built-in phono preamps, etc., allowing you to build various systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Yet Powerful:\u003c\/strong\u003e The MC331 only takes up minimal desktop space but boasts a maximum power output of 105W x2@4Ω, effectively driving your bookshelf speakers. Additionally, it has a pre-out and a 3.5mm headphone output, making it versatile enough.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUser-Friendly Design: \u003c\/strong\u003eThe MC331 comes with a remote control, allowing you to adjust bass and treble from the comfort of your listening chair. Its replaceable tube design lets you customize the sound signature to suit your personal preferences.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"What's on the device\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/B0DLWLZBL6.PT05_copy.jpg?v=1755296964\"\u003e\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMAX Power Output: \u003cstrong\u003e105W×2@4Ω\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eInput Mode: \u003cstrong\u003eBluetooth +RCA +USB +COA+OPT\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eOutput Mode: \u003cstrong\u003ePassive Speakers Output, Pre-Out, 3.5mm Headphone Output\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eTHD: \u003cstrong\u003e≤0.03%\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSNR: \u003cstrong\u003e≥100dB\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eDevice Dimension: \u003cstrong\u003e10 x 2 x 2.7 inches\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eTerminating Impedance: \u003cstrong\u003e4-8 Ohm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePower Supply: \u003cstrong\u003e24V\/4.5A\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eIn the Box\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"Contents of the box\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/B0DLWLZBL6.PT06_copy.jpg?v=1755296914\"\u003e\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":48950232187113,"sku":"MC331","price":129.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/MC331copy.jpg?v=1755297097"},{"product_id":"fosi-audio-ds2-mini-audio-usb-dac-headphone-amplifier","title":"Fosi Audio DS2 Mini Audio USB DAC Headphone Amplifier","description":"\u003ch2\u003eProduct details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUpgraded Version: A new generation USB-C portable headphone DAC and amplifier, supporting up to DSD256 and PCM 32bit\/384kHz decoding for a high-resolution sound reproduction. It delivers a powerful drive of up to 170mw 32Ω each channel, effortlessly powering high or low-impedance headphones with 3.5mm single-ended or 4.4mm balanced connections, immersing you in the exquisite world of music.\u003c\/li\u003e\n\u003cli\u003eFlagship Chips: Featuring two next-generation Cirrus Logic CS43131 DAC chips, the DS2 delivers superior system-level audio performance without draining your mobile source device's battery life. With its ultra-low 1μV noise floor, minimal 0.0001% THD, high 130dB SNR, and excellent 109dB SINAD, it enables you to enjoy pure sound.\u003c\/li\u003e\n\u003cli\u003eEasy to Use: Connect it to your audio source and enjoy high-quality music without any complicated settings. The device features independent 60-step volume control buttons, providing you with a seamless, stepless volume adjustment experience and supporting volume memory function.\u003c\/li\u003e\n\u003cli\u003eHigh Compatibility: Fully supports a wide range of mainstream audio source devices. Not only can it serve as a portable DAC and headphone amplifier for iPhone 15, 15 Plus, 15 Pro, iPad Pro, and Android phones, but it can also function as an external sound card for your computer, laptop or Mac, decoding high-quality music for you.\u003c\/li\u003e\n\u003cli\u003eExquisite and Durable: The DS2 is crafted from solid metal using CNC machining and shock-resistant. Its sleek design offers a smooth and comfortable grip, providing a refined tactile experience. In addition, Fosi Audio pledges to provide a 24-month worry-free warranty and responsive customer service to all users.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"Hero Shot Of Product\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/1_f455e79a-84b6-4c6c-a820-ac197b6b00ac.jpg?v=1755364779\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Efficient Design, Without Draining Battery\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/3_71141712-5af5-4798-9a8b-ffa48a8c9370.jpg?v=1755364861\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Dual Cirrus Logic DAC Chips\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/5_d49ae356-09a9-4f01-a50c-1f164396a797.jpg?v=1755365304\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"3.5mm And 4.4mm Outputs\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/4_f35a0f45-6610-40d7-a17e-573d84bc2f40.jpg?v=1755365908\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Supports 32bit\/384kHz, DSD256\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/7_0a8de935-fefb-41bb-abcc-c7fb3cda6dbb.jpg?v=1755365951\"\u003e\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecifications\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eDS2-2024\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Power\u003c\/td\u003e\n\u003ctd\u003e130mW(SE); 170mW(BAL)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminating Impedance\u003c\/td\u003e\n\u003ctd\u003e16~300Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Mode\u003c\/td\u003e\n\u003ctd\u003eUSB Type C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Mode\u003c\/td\u003e\n\u003ctd\u003e3.5MM + 4.4mm balanced output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Range\u003c\/td\u003e\n\u003ctd\u003e20Hz-20kHz (±0.5dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTHD\u003c\/td\u003e\n\u003ctd\u003e＜0.0001%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSNR\u003c\/td\u003e\n\u003ctd\u003e≥130dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSINAD\u003c\/td\u003e\n\u003ctd\u003e＞109dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNoise Floor\u003c\/td\u003e\n\u003ctd\u003e＜1μV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSampling Rate\u003c\/td\u003e\n\u003ctd\u003ePCM 32bit\/384kHz, DSD256\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDAC Chip Set\u003c\/td\u003e\n\u003ctd\u003eCS43131x2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Devices\u003c\/td\u003e\n\u003ctd\u003eiOS\/Android\/Mac\/Windows\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDevice Weight\u003c\/td\u003e\n\u003ctd\u003e3.2 ounces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat's in the box？\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eItem\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFosi Audio DS2 2024\u003c\/td\u003e\n\u003ctd\u003ex 1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType-C to Type-C cable\u003c\/td\u003e\n\u003ctd\u003ex 1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUSB-C to USB-A Converter\u003c\/td\u003e\n\u003ctd\u003ex 1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2251\/7913\/files\/DS2.pdf?v=1743988080\"\u003eUser Manual\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003ex 1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2251\/7913\/files\/DS2_foobar_installation_20240301.zip?v=1716535882\"\u003eDriver+Foobar installation\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e\/\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":48951146676457,"sku":"DS2","price":59.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/B0BJ66KJ2B.MAIN_f95ddbdf-b6e2-4833-8984-3f7ea116eaf9copy.jpg?v=1755366253"},{"product_id":"fosi-audio-gr40-tube-dac-headphone-amp-preamp","title":"Fosi Audio GR40 Tube DAC Headphone Amp\/Preamp","description":"\u003ch2\u003eProduct details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultifunctional DAC Preamplifier: \u003c\/strong\u003eThe GR40 is a versatile tube DAC preamplifier and headphone amplifier in one, it supports Bluetooth\/USB\/Optical\/Coaxial inputs and active speakers\/3.5mm headphone output, with a priority mode for headphones.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Resolution Decoding: \u003c\/strong\u003eWith the ESS9028Q2M DAC chip, the preamplifier offers superior audio quality and flexibility. The USB sampling rate supports 32Bit\/384kHz and DSD256, making an effective noise reduction to ensure lossless audio every time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvanced Bluetooth with Low Latency:\u003c\/strong\u003e Featuring the QCC3031 Bluetooth module, it supports aptX, aptX-HD, and aptX-LL codecs to provide detailed and clean audio sound. Also, you can get a relaxed experience with low latency when watching movies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact yet Creativity:\u003c\/strong\u003e With its compact form and a combination of preamp volume, bass, and treble controls, the stereo preamplifier produces a sweeter, more organic sound while preserving the midrange and treble frequencies that make music.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUser-Friendly Design: \u003c\/strong\u003eThe digital-to-analog audio converter GR40 is designed with user convenience at its core, allowing you to toggle between different audio inputs and restore Bluetooth-a real Plug-and-plug DAC preamplifier without any driver.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cimg alt=\"Enjoy The Warm Sound Of Tubes\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/2-1_copy.jpg?v=1755369443\"\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cimg alt=\"Chipset\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/4-1_copy.jpg?v=1755369458\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Compact Build\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/5-1_copy.jpg?v=1755369475\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Diagram Of The Front And Back\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/7-1_copy.jpg?v=1755369511\"\u003e\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e1. Bluetooth connection by others, what to do?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eLong press the Bluetooth reset button for 3 seconds; the Bluetooth indicator will flash, and the GR40 will enter pairing mode. Simply re-pair your device.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2. Using a smartphone as a source in USB mode, why does sound only\u003c\/strong\u003e \u003cstrong\u003ecome from the phone even when connections are correct?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCheck if the phone has data transfer enabled. Some models transfer data directly, while others require manual activation of this feature.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3. Can headphones and RCA outputs be used simultaneously?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe GR40 defaults to headphone priority output. To use RCA output, disconnect the headphones.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4. What are suitable tube models for replacement?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTubes such as EF95, 6Ak5, 6AK5W, 403A\/403B, 6J1, 6J1P, 6J2, 6J3, 6J4, 6J5 are compatible. You can test and choose according to your personal preference.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e When replacing tubes, ensure the GR40 is turned off and the tubes have cooled down to prevent burns or damage to the product.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eInput \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBluetooth, USB, Optical, Coaxial\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOutput\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRCA, 3.5mm Headphone Output\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChannel\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e2.0\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSNR\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e≥103dB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDynamic Range\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e104dB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHeadphone Impedance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e32Ω-300Ω\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHeadphone Outout Power\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e300mW@16Ω 250mW@32Ω\u003c\/p\u003e\n\u003cp\u003e50mW@250Ω 40mW@300Ω\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e20Hz-20kHz(±1dB)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSampling Rtae\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e32bit\/384kHz; DSD256\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBluetooth Version\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e5.1\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBluetooth Connection Distance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e≥10m\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBluetooth Transmission Format\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSBC, AAC, aptX, aptX HD, aptX LL\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVoltage Range\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDC 12V\u003c\/p\u003e\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGR40\u003c\/li\u003e\n\u003cli\u003e5654W Vacuum Tube*2\u003c\/li\u003e\n\u003cli\u003eDecorative Ring*2\u003c\/li\u003e\n\u003cli\u003ePower Adapter\u003c\/li\u003e\n\u003cli\u003eBluetooth Antenna\u003c\/li\u003e\n\u003cli\u003eUser Manual\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":48951240982761,"sku":"GR40","price":119.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/1-1_8aab53ed-9a91-4a05-a488-a23578c08cf3copy.jpg?v=1755369653"},{"product_id":"fosi-audio-mc331-tube-integrated-bluetooth-amplifier-with-dac-and-vu-meter-open-box","title":"Fosi Audio MC331 Tube Integrated Bluetooth Amplifier with DAC and VU Meter (Open Box)","description":"\u003ch2\u003eMini Nostalgic Aesthetics\u003c\/h2\u003e\n\u003cp\u003eCompact size, tube warmth, and remote control: A perfect combination for convenient and cozy audio enjoyment.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"MC331 In A Desktop Set Up\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/002_e725bdaf-a000-4fb6-abf7-b37306e0e87e.jpg?v=1755296208\"\u003e\u003c\/p\u003e\n\u003ch3\u003eAll-in-One DAC Amp\/Headphone Amp\u003c\/h3\u003e\n\u003cp\u003eThe 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. The VU meter and vacuum tubes add a touch of retro flair, delighting audio enthusiasts with both visual and auditory pleasure.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInput: RCA, Bluetooth, USB, Optical, Coaxial\u003c\/li\u003e\n\u003cli\u003eOutput: Passive Speakers Output, Pre-Out, 3.5mm Headphone\u003c\/li\u003e\n\u003cli\u003eOutputSNR≥100dB; THD≤0.03%; Bluetooth Codecs: SBC, AAC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"005-1_62da6046-ce45-4e98-a874-4e49e6b423bd\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/005-1_62da6046-ce45-4e98-a874-4e49e6b423bd.jpg?v=1755296495\"\u003e\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eHybrid Tube Integrated Amplifier\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMaximize Space Efficiency\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eJAN 5654W Vacum Tubes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCustomize Your Unique Sound\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMemory Function\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll-in-One DAC Amp:\u003c\/strong\u003e A DAC, amplifier, preamplifier, and headphone amplifier are all integrated into the Fosi Audio MC331. You can easily switch between audio sources with the help of the remote control, ensuring a seamless and enriched listening experience.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmazing Combination: \u003c\/strong\u003eAs an integrated tube DAC amp with a VU meter, the visual aesthetics of the 5654W vacuum tubes and VU meter add a nice warm and soft effect to not only the appearance but the sound as well, giving the modern look a retro feel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSetup Flexibility: \u003c\/strong\u003eIt supports Bluetooth, USB, coaxial, optical, and RCA inputs, making it compatible with a variety of sources such as computers, phones, CD players, turntables with built-in phono preamps, etc., allowing you to build various systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Yet Powerful:\u003c\/strong\u003e The MC331 only takes up minimal desktop space but boasts a maximum power output of 105W x2@4Ω, effectively driving your bookshelf speakers. Additionally, it has a pre-out and a 3.5mm headphone output, making it versatile enough.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUser-Friendly Design: \u003c\/strong\u003eThe MC331 comes with a remote control, allowing you to adjust bass and treble from the comfort of your listening chair. Its replaceable tube design lets you customize the sound signature to suit your personal preferences.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"What's on the device\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/B0DLWLZBL6.PT05_copy.jpg?v=1755296964\"\u003e\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMAX Power Output: \u003cstrong\u003e105W×2@4Ω\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eInput Mode: \u003cstrong\u003eBluetooth +RCA +USB +COA+OPT\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eOutput Mode: \u003cstrong\u003ePassive Speakers Output, Pre-Out, 3.5mm Headphone Output\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eTHD: \u003cstrong\u003e≤0.03%\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSNR: \u003cstrong\u003e≥100dB\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eDevice Dimension: \u003cstrong\u003e10 x 2 x 2.7 inches\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eTerminating Impedance: \u003cstrong\u003e4-8 Ohm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePower Supply: \u003cstrong\u003e24V\/4.5A\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eIn the Box\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"Contents of the box\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/B0DLWLZBL6.PT06_copy.jpg?v=1755296914\"\u003e\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":49247810846953,"sku":"MC331 (OB)","price":116.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/MC331copy.jpg?v=1755297097"},{"product_id":"fosi-audio-k7-desktop-dac-headphone-amplifier-open-box","title":"Fosi Audio K7 Desktop DAC Headphone Amplifier (Open Box)","description":"\u003ch2\u003e\n\u003cstrong\u003eHiFi and Gaming,\u003c\/strong\u003e\u003cstrong\u003eOne Device Meets Multiple Needs\u003c\/strong\u003e\n\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"Hifi And Gaming Setup\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/K7-1500x1000_a6ccde14-44ce-451b-86a5-92fec94d020f_copy.jpg?v=1755285227\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003ePure Music Enjoyment\u003c\/strong\u003e\u003c\/h3\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.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cimg alt=\"Gaming Set Up\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/gempages_477252102637224875-00ddd056-db07-4d1c-ac21-e36ed4745d99_copy.jpg?v=1755285298\"\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cstrong\u003eGaming Entertainment\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eCompatible with devices such as PC, PS5 Pro, PS5, and Switch, it 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\u003e\u003cstrong\u003e\u003cimg alt=\"K7's Chipset\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/gempages_477252102637224875-cafe19ef-a104-4a0d-9cca-6e839f8e19e0_copy.jpg?v=1755285290\"\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cstrong\u003eAudiophile-Grade Chipset\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eFor high resolution, wide dynamic range, ultra-low noise, low latency, and high output power. Captures more details for a flawless and pure listening experience\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Comprehensive Digital Inputs with Versatile Outputs\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/Screenshot_2025-08-15_at_1.48.16_PM.jpg?v=1755280258\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3.5mm\u003c\/strong\u003e\u003cstrong\u003eSingle-Ended Headphone Output \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRated Power\u003c\/p\u003e\n\u003cp\u003e≥600mW+600mW @32Ω\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4.4mm\u003c\/strong\u003e\u003cstrong\u003eBalanced Headphone Output\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRated Power≥2.1W+2.1W @32Ω\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3.5mm\u003c\/strong\u003e\u003cstrong\u003eMicrophone Input\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIntelligent Noise Reduction for Clearer Communications\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003eHi-Res\u003c\/strong\u003e \u003cstrong\u003eBluetooth Codecs\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003eEquipped with the Qualcomm QCC3031 Bluetooth chip, supporting aptX HD, aptX LL, aptX, AAC, and SBC codecs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUnder 40 ms\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eImperceptible latency\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLossless PCM 24bit\/48kHz \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSampling Rate\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003e1.5-Inch LCD\u003c\/strong\u003e \u003cstrong\u003eHigh Definition Display\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003cimg alt=\"K7's Display\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/gempages_477252102637224875-7b77b126-fc34-4e1b-b7e0-18e57c287b54.jpg?v=1755280569\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003eUser-Friendly and\u003c\/strong\u003e \u003cstrong\u003ePractical Control Design\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg alt=\"K7_Diagram\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/K7_Diagram.jpg?v=1755282488\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003eAll-Aluminum Alloy Body, \u003c\/strong\u003e\u003cstrong\u003ewith CNC Integrated Design\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003eA compact and exquisite full-metal chassis with fine sandblasting, robust and durable\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003eTriple Intelligent Protection,\u003c\/strong\u003e\u003cstrong\u003eUninterrupted Gaming and Entertainment\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003ch3\u003e\n\u003cstrong\u003eFully Balanced Circuitry,\u003c\/strong\u003e\u003cstrong\u003e0.0002% Ultra-Low Distortion\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003eEffectively reduces noise and interference, equipped with gain control and headphone protection circuits to ensure clear, authentic audio output, enhancing your listening experience\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003eMultiple LDO Regulators\u003c\/strong\u003e\u003cstrong\u003eEnsuring Clear Sound Quality\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003eEach stage utilizes low-noise LDO regulators for pure power output, enhancing audio performance with robust power support\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eApplication Scenarios\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg alt=\"Application 1\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/gempages_477252102637224875-3e03357a-eb33-4174-bf45-421f9194210a.jpg?v=1755282688\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg alt=\"Application 2\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/gempages_477252102637224875-9ea185df-c534-45ec-b07e-10ec4571f237.jpg?v=1755282717\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg alt=\"Application 3\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/gempages_477252102637224875-e70be2ed-3821-4a77-8c62-0c59b0e8e125.jpg?v=1755282743\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eVisible Superior Sound Quality\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThrough stringent real-world testing, sound excellence is transformed from abstract to a tangible assurance of quality\u003c\/p\u003e\n\u003ch2\u003eGeneral Specs\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eChipset\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eXMOS XU208+AKM4493SEQ+QCC 3031+TPA6120\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaximum Sampling Rate\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUSB:PCM 384kHz-32bit\/DSD256\u003c\/p\u003e\n\u003cp\u003eOptical: PCM 24bit\/192kHz\u003c\/p\u003e\n\u003cp\u003eCoaxial: PCM 24bit\/192kHz\u003c\/p\u003e\n\u003cp\u003eBluetooth:PCM 24bit\/48kHz\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHeadphone impedance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e16-300Ω\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInput\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCoaxial, Optical, USB-C,Bluetooth,3.5mm Microphone\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOutput\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRCA, 3.5mm Single-Ended,4.4mm Balanced\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFirmware Upgrade\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eXMOS firmware can be updated via the Type-C interface\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBluetooth Version\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e5.0\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBluetooth Connection Distance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e≤13m\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNoise Floor\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e≤2.5μV\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBluetooth Transmission Audio Format\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSBC, AAC, aptX, aptX HD, aptX LL\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInput Voltage and Current\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDC 12V 2A\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUSB Compatible Devices\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWindows 7,8, 8.1,10,11 (Driver required)\u003c\/p\u003e\n\u003cp\u003eMac OS X, Linux (No driver required)\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eAudio Parameters\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e-4.4mm Balanced Headphone Output\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRated Power Output\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eL+R≥2100mW+2100mW (32Ω\/THD+N＜1%)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSNR\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e121dB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTHD+N\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u0026lt;0.0002%\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDynamic Range\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e121dB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNoise Floor\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e≤ 6.5μV\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e-3.5mm Single-Ended Headphone Output\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRated Power Output\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eL+ R≥600mW+600mW (32Ω\/THD+N\u0026lt;1%)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSNR\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e122dB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTHD+N\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e0.0005%\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDynamic Range\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e121dB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNoise Floor\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e≤2.5μV\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e20Hz-20kHz (±0.1dB)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e-RCA Output\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Level\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e≥2Vrms\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSNR\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e20Hz-20kHz (±0.1dB)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTHD+N\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e0.0005%\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDynamic Range\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e121dB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNoise Floor\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e≤3μV\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e20Hz-20kHz\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003ePacking List\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFosi Audio K7\u003c\/li\u003e\n\u003cli\u003eUSB-A\/C to USB-C Cable\u003c\/li\u003e\n\u003cli\u003eBluetooth Antenna\u003c\/li\u003e\n\u003cli\u003eDC 12V Power Supply\u003c\/li\u003e\n\u003cli\u003e3.5mm Headphone Splitter\u003c\/li\u003e\n\u003cli\u003eUser Manual\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":49926710821097,"sku":"K7 (OB)","price":179.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/K7_9c69ba5b-cd28-400d-a7fe-e560070f39d4copy.jpg?v=1755285612"},{"product_id":"fosi-audio-gr40-tube-dac-headphone-amp-preamp-open-box","title":"Fosi Audio GR40 Tube DAC Headphone Amp\/Preamp (Open Box)","description":"\u003ch2\u003eProduct details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultifunctional DAC Preamplifier: \u003c\/strong\u003eThe GR40 is a versatile tube DAC preamplifier and headphone amplifier in one, it supports Bluetooth\/USB\/Optical\/Coaxial inputs and active speakers\/3.5mm headphone output, with a priority mode for headphones.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Resolution Decoding: \u003c\/strong\u003eWith the ESS9028Q2M DAC chip, the preamplifier offers superior audio quality and flexibility. The USB sampling rate supports 32Bit\/384kHz and DSD256, making an effective noise reduction to ensure lossless audio every time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvanced Bluetooth with Low Latency:\u003c\/strong\u003e Featuring the QCC3031 Bluetooth module, it supports aptX, aptX-HD, and aptX-LL codecs to provide detailed and clean audio sound. Also, you can get a relaxed experience with low latency when watching movies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact yet Creativity:\u003c\/strong\u003e With its compact form and a combination of preamp volume, bass, and treble controls, the stereo preamplifier produces a sweeter, more organic sound while preserving the midrange and treble frequencies that make music.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUser-Friendly Design: \u003c\/strong\u003eThe digital-to-analog audio converter GR40 is designed with user convenience at its core, allowing you to toggle between different audio inputs and restore Bluetooth-a real Plug-and-plug DAC preamplifier without any driver.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cimg alt=\"Enjoy The Warm Sound Of Tubes\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/2-1_copy.jpg?v=1755369443\"\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cimg alt=\"Chipset\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/4-1_copy.jpg?v=1755369458\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Compact Build\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/5-1_copy.jpg?v=1755369475\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Diagram Of The Front And Back\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/7-1_copy.jpg?v=1755369511\"\u003e\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e1. Bluetooth connection by others, what to do?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eLong press the Bluetooth reset button for 3 seconds; the Bluetooth indicator will flash, and the GR40 will enter pairing mode. Simply re-pair your device.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2. Using a smartphone as a source in USB mode, why does sound only\u003c\/strong\u003e \u003cstrong\u003ecome from the phone even when connections are correct?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCheck if the phone has data transfer enabled. Some models transfer data directly, while others require manual activation of this feature.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3. Can headphones and RCA outputs be used simultaneously?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe GR40 defaults to headphone priority output. To use RCA output, disconnect the headphones.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4. What are suitable tube models for replacement?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTubes such as EF95, 6Ak5, 6AK5W, 403A\/403B, 6J1, 6J1P, 6J2, 6J3, 6J4, 6J5 are compatible. You can test and choose according to your personal preference.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e When replacing tubes, ensure the GR40 is turned off and the tubes have cooled down to prevent burns or damage to the product.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eInput \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBluetooth, USB, Optical, Coaxial\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOutput\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRCA, 3.5mm Headphone Output\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChannel\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e2.0\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSNR\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e≥103dB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDynamic Range\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e104dB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHeadphone Impedance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e32Ω-300Ω\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHeadphone Outout Power\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e300mW@16Ω 250mW@32Ω\u003c\/p\u003e\n\u003cp\u003e50mW@250Ω 40mW@300Ω\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e20Hz-20kHz(±1dB)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSampling Rtae\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e32bit\/384kHz; DSD256\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBluetooth Version\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e5.1\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBluetooth Connection Distance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e≥10m\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBluetooth Transmission Format\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSBC, AAC, aptX, aptX HD, aptX LL\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVoltage Range\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDC 12V\u003c\/p\u003e\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGR40\u003c\/li\u003e\n\u003cli\u003e5654W Vacuum Tube*2\u003c\/li\u003e\n\u003cli\u003eDecorative Ring*2\u003c\/li\u003e\n\u003cli\u003ePower Adapter\u003c\/li\u003e\n\u003cli\u003eBluetooth Antenna\u003c\/li\u003e\n\u003cli\u003eUser Manual\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":50886343393513,"sku":"GR40 (OB)","price":101.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/1-1_8aab53ed-9a91-4a05-a488-a23578c08cf3copy.jpg?v=1755369653"},{"product_id":"fosi-audio-i5-open-back-planar-magnetic-headphones-open-box","title":"Fosi Audio i5 Open-Back Planar Magnetic Headphones (Open Box)","description":"\u003ch2\u003eHiFi Headphones for Passionate Audiophiles\u003c\/h2\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e97mm Diaphragm\u003c\/li\u003e\n\u003cli\u003eWalnut Wood\u003c\/li\u003e\n\u003cli\u003eMagnetic Array\u003c\/li\u003e\n\u003cli\u003eAluminum Frame\u003c\/li\u003e\n\u003cli\u003eSputtered Coating\u003c\/li\u003e\n\u003cli\u003eDetachable Cables\u003c\/li\u003e\n\u003cli\u003eGenuine Suede\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\n\u003cstrong\u003eImmersive Listening\u003c\/strong\u003e \u003cstrong\u003ePure Original Sound\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003eCrafted with an ultra-thin diaphragm using nano-level technology, an invisible high-powered magnetic system, and precision acoustic design, the i5 delivers high resolution and low distortion for a truly lifelike listening experience.\u003c\/p\u003e\n\u003ch3\u003e97mm Ultra-Large Diaphragm\u003c\/h3\u003e\n\u003cp\u003eThe ultra-thin diaphragm, crafted with nano-level precision, delivers faster response, enhanced detail, and a more natural, clear, and layered sound.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"i5's Diaphragm\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/gempages_477252102637224875-47c9ca79-0a50-4450-a2b6-711655950602.jpg?v=1755286751\"\u003e\u003c\/p\u003e\n\u003ch3\u003eSputtered Coating Technology\u003c\/h3\u003e\n\u003cp\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\/p\u003e\n\u003cp\u003e\u003cimg alt=\"i5's Sputtered Coating\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/gempages_477252102637224875-2db2efdd-814b-44b2-a158-96af9e804cf5.jpg?v=1755286873\"\u003e\u003c\/p\u003e\n\u003ch3\u003eSymmetrically Arranged High-Strength Magnetic Matrix\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\u003cp\u003e\u003cimg alt=\"Magnetic Array\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/gempages_477252102637224875-61fe5c00-ad26-48c4-b823-6b87b07a7bee.jpg?v=1755286962\"\u003e\u003c\/p\u003e\n\u003ch3\u003eRigid High-Transparency Acoustic 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 alt=\"Acoustic Mesh\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/gempages_477252102637224875-097342e0-67bc-4141-9406-015a168f3fe7.jpg?v=1755287032\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003eErgonomic Design\u003c\/strong\u003e \u003cstrong\u003eLong-Lasting Comfort\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003eDesigned to follow the natural contours of the head, the i5 ensures a secure yet gentle fit. Even during extended listening sessions, it remains comfortable and pressure-free, letting you enjoy your music without distraction.\u003c\/p\u003e\n\u003ch3\u003eDual-Axis Ear Cup Arms\u003c\/h3\u003e\n\u003cp\u003eAllows seamless vertical and horizontal rotation for a custom fit to different head shapes, enhancing both comfort and stability.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"gempages_477252102637224875-d1679a78-5451-48c8-a18d-ef3d07f2af9b\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/gempages_477252102637224875-d1679a78-5451-48c8-a18d-ef3d07f2af9b.jpg?v=1755287189\"\u003e\u003c\/p\u003e\n\u003ch3\u003eStepless Silicone Adjustment\u003c\/h3\u003e\n\u003cp\u003eThe headband features a silicone adjustment slider with a damped, smooth feel, enabling easy and precise positioning based on personal preference.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"gempages_477252102637224875-7618d036-a76a-4bb2-844a-1d10418956a4\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/gempages_477252102637224875-7618d036-a76a-4bb2-844a-1d10418956a4.jpg?v=1755287249\"\u003e\u003c\/p\u003e\n\u003ch3\u003eDurable Memory Metal Headband\u003c\/h3\u003e\n\u003cp\u003eMade of high-strength memory metal, the headband maintains its shape over time. Lightweight and flexible, it reduces pressure and enhances comfort.\u003c\/p\u003e\n\u003ch3\u003eBreathable Skin-Friendly Earpads\u003c\/h3\u003e\n\u003cp\u003eCrafted with perforated leather and breathable fabric, the earpads stay cool and soft. Memory foam inside ensures all-day comfort without overheating.\u003c\/p\u003e\n\u003ch3\u003eRefined Craftsmanship, Where Aesthetics Meet Quality\u003c\/h3\u003e\n\u003cp\u003eA refined fusion of premium materials and elegant design, delivering a look that exudes sophistication, texture, and distinctive character.\u003c\/p\u003e\n\u003ch3\u003eGenuine Suede Leather Headband\u003c\/h3\u003e\n\u003cp\u003eSoft and refined for a more comfortable fi\u003c\/p\u003e\n\u003ch3\u003eLuxurious Walnut Wood Frame\u003c\/h3\u003e\n\u003cp\u003eEach pair features a unique natural grain.\u003c\/p\u003e\n\u003ch3\u003eCNC-Machined Aluminum Frame\u003c\/h3\u003e\n\u003cp\u003eLightweight yet sturdy with a metallic finish\u003c\/p\u003e\n\u003ch3\u003eS-Shaped Decorative Accent\u003c\/h3\u003e\n\u003cp\u003eElegant and flowing, inspired by musical notes\u003c\/p\u003e\n\u003ch3\u003eDetachable Cable Design\u003c\/h3\u003e\n\u003cp\u003eThe i5 features a detachable cable design with standard 3.5mm connectors on both sides, and is compatible with our available 3.5mm and 4.4mm headphone cables.\u003c\/p\u003e\n\u003ch2\u003eWhat‘s in the box？\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ei5 Headphone\u003c\/li\u003e\n\u003cli\u003e6.35mm Adaptor\u003c\/li\u003e\n\u003cli\u003e3.5mm Cable\u003c\/li\u003e\n\u003cli\u003eUser Manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecification\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDevice Type\u003c\/td\u003e\n\u003ctd\u003eOpen-Back Wired Headphones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransducer Type\u003c\/td\u003e\n\u003ctd\u003ePlanar Magnetic Drivers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Sound Pressure Level\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;120 dBSPL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Response\u003c\/td\u003e\n\u003ctd\u003e10Hz - 50kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTHD\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 1% @100 dBSPL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensitivity\u003c\/td\u003e\n\u003ctd\u003e98dB\/mW @ 1kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Impedance\u003c\/td\u003e\n\u003ctd\u003e28Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Power\u003c\/td\u003e\n\u003ctd\u003e≥ 500mW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Recommended Power\u003c\/td\u003e\n\u003ctd\u003e100mW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e550g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":51887575171305,"sku":"i5 (OB)","price":467.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/fosi-audio-0-i5-thumb.png?v=1755288316"}],"url":"https:\/\/audio46.mom\/collections\/fosi-audio.oembed","provider":"Audio46 Headphone Store","version":"1.0","type":"link"}