{"title":"Fosi Audio","description":"\u003cdiv class=\"brand-description\"\u003e\n\u003ch2\u003eFosi Audio – Brand Overview\u003c\/h2\u003e\n\u003cp\u003eIf you have ever searched for compact digital amplifiers on Amazon or other major e-commerce platforms, the name \u003cstrong\u003eFosi Audio\u003c\/strong\u003e has likely caught your eye. Founded in \u003cstrong\u003e2017\u003c\/strong\u003e in Shenzhen, the brand quickly drew attention with a series of small-sized, budget-friendly digital amplifiers. Compared with many traditional audio companies, Fosi Audio has grown more like an “internet company”: relying heavily on user feedback, iterating products rapidly, and building recognition through online platforms. It appeals especially to those who want authentic sound performance without paying premium prices or dealing with complicated setups, while also resonating with users who value simple design and community interaction.\u003c\/p\u003e\n\u003ch3\u003eBrand Style \u0026amp; Philosophy\u003c\/h3\u003e\n\u003cp\u003eFosi Audio does not position itself as a maker of high-end flagship products. Instead, its aim is to let more people experience Hi-Fi at a reasonable cost. The brand spirit emphasizes \u003cstrong\u003epracticality, sincerity, and innovation\u003c\/strong\u003e—its products are typically compact, straightforward, and directly aligned with market needs, making them suitable for beginners or anyone who prefers a simplified setup.\u003c\/p\u003e\n\u003ch3\u003eDevelopment \u0026amp; Milestones\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2017\u003c\/strong\u003e: Released the first V1.0 amplifier, marking entry into the international market.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2020\u003c\/strong\u003e: The Bluetooth digital amplifier \u003cem\u003eBT20A\u003c\/em\u003e became a hit on Amazon and a best-selling model.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2023\u003c\/strong\u003e: New models such as \u003cem\u003eV3\u003c\/em\u003e and \u003cem\u003eZA3\u003c\/em\u003e were launched in response to user demands, offering more complete functionality.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2024 onward\u003c\/strong\u003e: Product lines expanded into DACs, preamps, headphones, and bookshelf speakers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Impression\u003c\/h3\u003e\n\u003cp\u003eFor most users, Fosi Audio is not about chasing “ultimate audiophile sound,” but rather about practical designs that deliver enough power in a compact size. The products emphasize being “sufficient and easy to use” while still maintaining solid detail and clarity. For those looking to add a convenient amplifier to a desktop setup, study, or small room, this brand is often recommended.\u003c\/p\u003e\n\u003ch3\u003eCurrent Position\u003c\/h3\u003e\n\u003cp\u003eToday, Fosi Audio’s catalog spans multiple categories from entry-level to mid-tier, with its presence continuing to expand globally. For newcomers, it is an approachable starting point; for experienced enthusiasts, it is a reasonably priced brand worth exploring for different setups. Instead of pursuing luxury, Fosi Audio’s defining trait is its \u003cstrong\u003eapproachability\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e","products":[{"product_id":"fosi-ds2","title":"Fosi Audio DS2 Portable DAC | Headphone Amp","description":"\u003cul dir=\"auto\"\u003e\n\u003cli\u003eUpgraded USB-C portable headphone DAC and amplifier supporting up to DSD256 and PCM 32bit\/384kHz decoding for high-resolution audio playback.\u003c\/li\u003e\n\u003cli\u003ePowerful output delivering 128mW at 32Ω for single-ended and 510mW at 32Ω for balanced connections, suitable for a wide range of headphones.\u003c\/li\u003e\n\u003cli\u003eDual Cirrus Logic CS43131 DAC chips providing ultra-low distortion with 0.0002% THD+N, 130dB SNR, and exceptional dynamic range.\u003c\/li\u003e\n\u003cli\u003eIndependent 60-step volume control with memory function for precise and convenient adjustments.\u003c\/li\u003e\n\u003cli\u003eBroad compatibility with iOS, Android, Windows, and Mac devices, functioning as an external sound card.\u003c\/li\u003e\n\u003cli\u003eDurable CNC-machined metal construction for shock resistance and comfortable handling.\u003c\/li\u003e\n\u003cli\u003eSupports 3.5mm single-ended and 4.4mm balanced headphone outputs for versatile connectivity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"auto\"\u003eProduct Overview\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eThe Fosi Audio DS2 is a compact, portable USB DAC and headphone amplifier designed to elevate your audio experience on the go. With its USB-C input, it seamlessly connects to smartphones, tablets, laptops, and desktops, delivering high-fidelity sound that surpasses built-in device audio capabilities. Whether you're listening to music, watching movies, or gaming, the DS2 ensures crystal-clear audio reproduction with support for advanced decoding formats like PCM up to 32bit\/384kHz and DSD up to 256. Its plug-and-play design requires no additional drivers for most devices, making it an ideal choice for audiophiles and casual listeners alike who demand better sound quality from their portable setups.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eSuperior Sound Quality and Performance\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eAt the heart of the Fosi Audio DS2 are dual flagship Cirrus Logic CS43131 DAC chips, renowned for their precision and low power consumption. These chips enable the DS2 to achieve an impressive signal-to-noise ratio of 130dB and a dynamic range of 130dB, ensuring that every nuance in your music is captured without interference. The total harmonic distortion plus noise is kept at an ultra-low 0.0002%, providing distortion-free playback that rivals desktop audio equipment. The frequency response spans 20Hz to 20kHz with minimal deviation of ±0.5dB, preserving the full spectrum of sound from deep bass to sparkling highs. This level of performance makes the DS2 perfect for high-resolution audio files, allowing you to hear details in your favorite tracks that you might have missed before.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003ePowerful Amplification for Demanding Headphones\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eThe DS2 packs serious power in its small form factor, offering 128mW at 32 ohms through the 3.5mm single-ended output and a robust 170mW at 32 ohms via the 4.4mm balanced output. This ample power output ensures it can drive a variety of headphones, from sensitive in-ear monitors to more demanding over-ear models with impedances ranging from 16 to 300 ohms. The balanced connection reduces crosstalk and improves channel separation, resulting in a wider soundstage and more immersive listening experience. Whether you're using low-impedance earbuds or high-impedance headphones, the DS2 provides clean, powerful amplification without straining your source device's battery, thanks to its efficient design.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eUser-Friendly Features and Controls\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eSimplicity is key with the Fosi Audio DS2. It features dedicated volume up and down buttons with 60-step precision control, allowing for fine-tuned adjustments without relying on your device's volume rocker. The volume memory function remembers your last setting, so you can pick up right where you left off. An LED indicator displays the current sampling rate through color coding: red for under 48kHz, green for 48-96kHz, yellow for 96-384kHz, and blue for DSD playback. This visual feedback helps you confirm you're getting the highest quality audio possible. The device operates without a built-in battery, drawing minimal power from your connected device, and it remains cool during extended use with a typical temperature rise of 15-25°C.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eWide Compatibility and Versatility\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eThe Fosi Audio DS2 is engineered for universal compatibility, working seamlessly with iOS devices like the iPhone 15 series and iPad Pro (using a Lightning to USB-C OTG cable if needed), Android smartphones (with OTG enabled on some models), Windows computers, and Mac systems. It serves as an external sound card, bypassing inferior built-in audio hardware to deliver superior sound quality for music playback, video streaming, and even calls (though call audio uses the device's built-in speaker and mic). For optimal DSD playback, use compatible apps like HiByMusic on mobile devices or Foobar2000 on computers. This versatility makes the DS2 an essential accessory for anyone looking to upgrade their audio setup across multiple platforms without compatibility hassles.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eBuild Quality and Durability\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eCrafted from high-quality aluminum alloy using precision CNC machining, the Fosi Audio DS2 boasts a robust yet lightweight build weighing just 90 grams. Its solid metal construction provides excellent shock resistance, protecting the internal components from daily wear and tear. The sleek, compact design fits comfortably in your hand or pocket, making it perfect for travel or daily commutes. The USB-C input and dual headphone outputs are securely integrated, ensuring reliable connections every time. Backed by a 24-month warranty and responsive customer support, the DS2 offers peace of mind alongside its premium performance.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eSpecifications\u003c\/h3\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eDAC Chip:\u003c\/strong\u003e Dual CS43131\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDecoding Support:\u003c\/strong\u003e PCM up to 32bit\/384kHz, DSD64\/128\/256\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Power:\u003c\/strong\u003e Single-Ended (3.5mm): 128mW @ 32Ω; Balanced (4.4mm): 510mW @ 32Ω\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal-to-Noise Ratio (SNR):\u003c\/strong\u003e 130dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDynamic Range:\u003c\/strong\u003e 130dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal Harmonic Distortion + Noise (THD+N):\u003c\/strong\u003e 0.0002%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 20Hz-20kHz ±0.5dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended Headphone Impedance:\u003c\/strong\u003e 16-300Ω (both SE and BAL)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput:\u003c\/strong\u003e USB Type-C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutputs:\u003c\/strong\u003e 3.5mm Single-Ended, 4.4mm Balanced\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Mac, Windows, iOS, Android\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e Compact portable design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 90g\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Fosi","offers":[{"title":"Default Title","offer_id":47163996373149,"sku":null,"price":99.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0241\/8111\/2928\/files\/FosiAudioDS2DongleDACHeadphoneAmplifier_3.jpg?v=1757438133"},{"product_id":"fosi-q5","title":"Fosi Audio Q5 DAC | Headphone Amplifier","description":"\u003cul dir=\"auto\"\u003e\n\u003cli\u003eCompact desktop DAC and headphone amplifier with ESS ES9018K2M DAC chip for high-resolution audio decoding up to 24-bit\/192kHz PCM.\u003c\/li\u003e\n\u003cli\u003ePowerful TPA6120 headphone amplifier delivering up to 400mW at 32 ohms, suitable for headphones with 16-250 ohm impedance.\u003c\/li\u003e\n\u003cli\u003eMultiple digital inputs including USB-B, optical Toslink, and coaxial SPDIF for versatile connectivity with various audio sources.\u003c\/li\u003e\n\u003cli\u003eDual headphone outputs: 3.5mm and 6.35mm jacks, plus stereo RCA line output for connection to amplifiers or powered speakers.\u003c\/li\u003e\n\u003cli\u003ePlug-and-play compatibility with Windows, Mac, and other devices, no drivers required for most systems.\u003c\/li\u003e\n\u003cli\u003ePrecision volume control knob that adjusts both headphone and line outputs, with input selection via front panel button.\u003c\/li\u003e\n\u003cli\u003eAluminum alloy chassis for durability and effective heat dissipation, ensuring reliable performance during extended use.\u003c\/li\u003e\n\u003cli\u003eLow distortion and high signal-to-noise ratio for clean, detailed sound reproduction across the full frequency range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"auto\"\u003eProduct Overview\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eThe Fosi Audio Q5 is a versatile desktop DAC and headphone amplifier designed to enhance your audio setup with high-fidelity sound reproduction. Combining digital-to-analog conversion and powerful amplification in a compact form factor, this device serves as an ideal solution for audiophiles seeking improved audio quality from their computers, CD players, or other digital sources. With its ability to decode high-resolution audio up to 24-bit\/192kHz, the Q5 unlocks the full potential of your music library, delivering nuanced details and dynamic range that built-in sound cards often fail to capture. Its straightforward design features easy input selection and volume control, making it user-friendly for both novice and experienced users. Whether you're using it as a dedicated headphone amp or as a preamplifier in a larger system, the Q5 integrates seamlessly into home audio environments, providing a significant upgrade over standard audio outputs.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eSuperior Audio Conversion and Processing\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eAt the core of the Fosi Audio Q5 is the renowned ESS ES9018K2M DAC chip, which ensures precise digital-to-analog conversion with support for PCM audio up to 24-bit\/192kHz. This chip is complemented by a SA9123L USB interface and CS8416 SPDIF receiver, allowing for low-jitter performance and accurate signal processing from various inputs. The result is audio playback with exceptional clarity, minimal noise, and a wide frequency response of 10Hz to 20kHz with only ±0.5dB variation. This setup excels in reproducing the subtleties of high-resolution tracks, from the deepest bass notes to the highest trebles, without introducing unwanted artifacts. For those who value fidelity, the Q5's low total harmonic distortion plus noise (THD+N) of less than 0.002% and signal-to-noise ratio (SNR) greater than 110dB ensure that your listening experience remains pure and immersive, making it a standout choice for critical listening sessions or professional audio applications.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003ePowerful Headphone Amplification\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eThe Q5's headphone amplification section is powered by the high-performance TPA6120A2 chip, paired with LME49720 operational amplifiers, to deliver robust output capable of driving a wide range of headphones. With up to 400mW of power at 32 ohms, it handles demanding loads from 16 to 250 ohms with ease, providing ample headroom for dynamic peaks and sustained volume levels. This amplification ensures that even high-impedance headphones receive sufficient drive without distortion, resulting in a balanced soundstage with excellent channel separation. The dual headphone outputs—3.5mm for portable earphones and 6.35mm for professional studio headphones—offer flexibility for different listening scenarios. Whether you're monitoring audio in a studio setting or enjoying music at home, the Q5's amp stage maintains control and precision, preventing clipping and preserving the integrity of the original recording.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eUser-Friendly Features and Controls\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eDesigned with simplicity in mind, the Fosi Audio Q5 features a front-panel power button that doubles as an input selector, allowing quick switching between USB, optical, and coaxial sources. An LED indicator displays the active input, while the large volume knob provides smooth, precise control over both the headphone and RCA outputs. This integrated volume adjustment eliminates the need for separate controls, streamlining your setup. The device operates without requiring additional software or drivers for most operating systems, supporting plug-and-play functionality on Windows and Mac computers. For added convenience, it includes protection circuits to safeguard against over-current, short-circuits, and thermal issues, ensuring long-term reliability. These features make the Q5 an accessible entry point into high-end audio, suitable for desktops, home theaters, or even portable setups when paired with compatible devices.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eVersatile Connectivity and Compatibility\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eThe Fosi Audio Q5 offers comprehensive connectivity options to integrate with a variety of audio systems. Its inputs include USB-B for direct computer connection, optical Toslink for devices like TVs or game consoles, and coaxial SPDIF for CD players or digital transports. The outputs consist of stereo RCA for linking to power amplifiers or active speakers, alongside the dual headphone jacks for personal listening. This versatility allows the Q5 to serve as a central hub in your audio chain, bypassing inferior built-in DACs in source devices. It is compatible with a broad range of operating systems and audio formats, though it does not support Dolby-encoded signals. For mobile users, it can connect to smartphones with OTG support via appropriate adapters, expanding its use beyond traditional desktop environments. This wide compatibility ensures the Q5 remains relevant in evolving audio setups, from casual streaming to high-resolution file playback.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eBuild Quality and Durability\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eConstructed from durable aluminum alloy, the Fosi Audio Q5 boasts a sleek, compact chassis measuring 98mm x 165mm x 35mm, making it easy to place on any desk or shelf without taking up excessive space. The metal housing not only provides a premium feel but also aids in heat dissipation, keeping the unit cool during prolonged operation. Weighing lightly, it is built to withstand daily use, with secure connectors that resist wear over time. The black finish adds a professional aesthetic that complements modern audio equipment. Backed by a 2-year warranty, the Q5 offers peace of mind regarding its longevity and performance. This robust construction, combined with high-quality internal components, positions the Q5 as a reliable investment for anyone looking to elevate their audio experience without compromising on build integrity.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eSpecifications\u003c\/h3\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eDAC Chip:\u003c\/strong\u003e ESS ES9018K2M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSB Interface:\u003c\/strong\u003e SA9123L\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSPDIF Receiver:\u003c\/strong\u003e CS8416\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperational Amplifier:\u003c\/strong\u003e LME49720\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeadphone Amplifier Chip:\u003c\/strong\u003e TPA6120A2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupported Sampling Rates:\u003c\/strong\u003e PCM up to 24-bit\/192kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 10Hz-20kHz (±0.5dB)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeadphone Output Power:\u003c\/strong\u003e 400mW @ 32Ω\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal-to-Noise Ratio (SNR):\u003c\/strong\u003e \u0026gt;110dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal Harmonic Distortion + Noise (THD+N):\u003c\/strong\u003e \u0026lt;0.002% (1kHz)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended Headphone Impedance:\u003c\/strong\u003e 16-250Ω\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInputs:\u003c\/strong\u003e USB-B, Optical Toslink, Coaxial SPDIF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutputs:\u003c\/strong\u003e Stereo RCA, 3.5mm Headphone, 6.35mm Headphone\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e 12V DC \/ 1A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 98 x 165 x 35mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Aluminum Alloy\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Fosi","offers":[{"title":"Default Title","offer_id":47164010922141,"sku":null,"price":119.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0241\/8111\/2928\/files\/Fosi-Audio-Q5-DAC-headphone-amp_2.jpg?v=1757437639"},{"product_id":"fosi-sk02","title":"Fosi Audio SK02 DAC | Headphone Amplifier","description":"\u003cul dir=\"auto\"\u003e\n\u003cli\u003eHigh-performance desktop DAC and headphone amplifier with ESS ES9038Q2M DAC chip for superior audio decoding up to PCM 32-bit\/384kHz and DSD256.\u003c\/li\u003e\n\u003cli\u003ePowerful amplification delivering up to 1100mW at 32 ohms via balanced 4.4mm output, suitable for headphones and IEMs from 16 to 300 ohms.\u003c\/li\u003e\n\u003cli\u003eMultiple inputs including USB Type-C and optical Toslink, with outputs for 3.5mm single-ended, 4.4mm balanced headphones, 3.5mm line out, and optical pass-through.\u003c\/li\u003e\n\u003cli\u003eUltra-low distortion with THD less than or equal to 0.001% at 1kHz and high signal-to-noise ratio up to 120dB for crystal-clear sound.\u003c\/li\u003e\n\u003cli\u003ePlug-and-play design with no drivers required, featuring a multi-functional knob for volume, power, and playback control.\u003c\/li\u003e\n\u003cli\u003eHigh and low gain modes with quick-switch buttons and colorful LED indicators for sampling rate and operational status.\u003c\/li\u003e\n\u003cli\u003eVersatile connectivity for computers, laptops, CD players, TVs, and projectors, doubling as a preamp for active or passive speakers.\u003c\/li\u003e\n\u003cli\u003eDurable aluminum alloy construction via CNC machining, compact size for desktop use, and backed by a 24-month warranty.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"auto\"\u003eProduct Overview\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eThe Fosi Audio SK02 is a compact desktop DAC and headphone amplifier that combines high-resolution audio decoding with powerful amplification in a sleek, user-friendly package. Designed for audiophiles and casual listeners alike, it supports advanced formats like PCM up to 32-bit\/384kHz and DSD256 through its USB input, while the optical input handles up to 24-bit\/192kHz. With dual headphone outputs—3.5mm single-ended and 4.4mm balanced—the SK02 caters to a wide range of headphones and in-ear monitors, delivering robust power to drive even demanding loads. Its plug-and-play functionality eliminates the need for drivers, making it compatible with Windows, Mac, and other devices right out of the box. Whether you're upgrading your desktop audio setup, connecting to a TV for better sound, or using it as a preamp in a home theater system, the SK02 provides an affordable yet high-performing solution that enhances every listening session with detailed, immersive sound.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eSuperior Audio Decoding and Processing\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eAt the heart of the Fosi Audio SK02 lies the premium ESS SABRE ES9038Q2M DAC chip, renowned for its precision and ability to handle high-resolution audio files with exceptional fidelity. This chip ensures accurate digital-to-analog conversion, supporting PCM formats up to 32-bit\/384kHz and native DSD256 playback via USB, allowing you to experience music as the artist intended with minimal jitter and artifacts. The optical input complements this by accepting signals up to 24-bit\/192kHz, ideal for connecting to sources like CD players or gaming consoles. Paired with high-quality SGM8262 operational amplifiers, the SK02 achieves an ultra-low total harmonic distortion (THD) of ≤0.001% at 1kHz and a frequency response of 20Hz-20kHz with ±0.02dB deviation, preserving the full spectrum of sound from deep lows to crisp highs. This setup results in a noise floor as low as 3.7μV, ensuring that subtle details in recordings emerge without background interference, making it a top choice for critical listening and high-fidelity audio enthusiasts.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003ePowerful and Versatile Amplification\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eThe SK02's amplification stage is engineered to provide ample power for a variety of headphones, featuring high and low gain modes to match different sensitivities and impedances ranging from 16 to 300 ohms. Through the 4.4mm balanced output, it delivers up to 1100mW at 32 ohms in high gain mode, dropping to 550mW at 64 ohms, 150mW at 250 ohms, and 120mW at 300 ohms, while low gain offers 350mW at 32 ohms, 180mW at 64 ohms, 50mW at 250 ohms, and 40mW at 300 ohms. The 3.5mm single-ended output provides 280mW at 32 ohms in high gain, scaling down accordingly. This power ensures dynamic headroom for explosive transients and sustained volume without distortion, enhancing the soundstage and separation in balanced mode. The inclusion of a 3.5mm line output allows the SK02 to function as a preamp, connecting to external amplifiers or powered speakers, expanding its utility beyond personal listening to full home audio systems.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eUser-Friendly Features and Controls\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eEase of use is a hallmark of the Fosi Audio SK02, with a large multi-functional knob that handles power on\/off, volume adjustments, and even play\/pause functionality for seamless control. Dedicated buttons allow quick switching between high and low gain modes as well as input sources, while colorful LED indicators provide at-a-glance information on the current sampling rate and operational status—red for standard rates, blue for high-res, and purple for DSD. This intuitive interface eliminates complexity, making it accessible for beginners while satisfying advanced users. Powered solely by a 5V USB Type-C connection, the SK02 draws minimal energy and operates without overheating, ensuring reliable performance during long sessions. Its optical pass-through output further adds convenience, allowing daisy-chaining to other devices without signal loss.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eWide Compatibility and Connectivity\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eThe Fosi Audio SK02 excels in versatility, offering USB Type-C and optical Toslink inputs for broad compatibility with modern devices. Connect it to computers or laptops for an instant audio upgrade, or link it to TVs, projectors, and CD players via optical for enhanced media playback. It serves as an external sound card, bypassing inferior built-in audio hardware to deliver superior quality for music, movies, and games. While it supports high-resolution formats on USB, the optical input ensures stable connections for standard hi-fi sources. Additionally, the SK02 can integrate into larger setups by outputting to amplifiers like the Fosi Audio V3 or ZA3, making it a flexible component for both desktop and home theater environments. No additional software is needed, ensuring hassle-free setup across Windows, Mac, and other platforms.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eBuild Quality and Durability\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eCrafted from a single piece of aluminum alloy using precision CNC machining and sandblasting, the Fosi Audio SK02 boasts a premium, durable build that withstands daily use while maintaining an elegant appearance. Measuring just 4.76 x 2 x 1.69 inches and weighing 0.84 pounds, its compact footprint fits neatly on any desk or shelf without clutter. The robust construction provides excellent heat dissipation and protection against impacts, ensuring longevity. Secure connectors for all inputs and outputs minimize wear over time, and the overall design prioritizes both aesthetics and functionality. With a 24-month warranty and dedicated customer support, the SK02 offers reassurance that your investment in high-quality audio is protected, making it a reliable choice for long-term enjoyment.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eSpecifications\u003c\/h3\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e SK02\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDAC Chip:\u003c\/strong\u003e ES9038Q2M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperational Amplifiers:\u003c\/strong\u003e SGM8262\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInputs:\u003c\/strong\u003e USB Type-C, Optical Toslink\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutputs:\u003c\/strong\u003e 3.5mm Headphone (Single-Ended), 4.4mm Headphone (Balanced), 3.5mm Line Out, Optical Pass-Through\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupported Formats (USB):\u003c\/strong\u003e PCM up to 32-bit\/384kHz, DSD256\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupported Formats (Optical):\u003c\/strong\u003e Up to 24-bit\/192kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Power (3.5mm High Gain):\u003c\/strong\u003e 280mW @ 32Ω, 130mW @ 64Ω, 40mW @ 250Ω, 30mW @ 300Ω\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Power (3.5mm Low Gain):\u003c\/strong\u003e 90mW @ 32Ω, 50mW @ 64Ω, 15mW @ 250Ω, 10mW @ 300Ω\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Power (4.4mm High Gain):\u003c\/strong\u003e 1100mW @ 32Ω, 550mW @ 64Ω, 150mW @ 250Ω, 120mW @ 300Ω\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Power (4.4mm Low Gain):\u003c\/strong\u003e 350mW @ 32Ω, 180mW @ 64Ω, 50mW @ 250Ω, 40mW @ 300Ω\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 20Hz-20kHz (±0.02dB)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal Harmonic Distortion (THD):\u003c\/strong\u003e ≤0.001% @ 1kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal-to-Noise Ratio (SNR, 3.5mm):\u003c\/strong\u003e 116dB (Low Gain), 120dB (High Gain)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal-to-Noise Ratio (SNR, 4.4mm):\u003c\/strong\u003e 110dB (Low Gain), 115dB (High Gain)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNoise Floor:\u003c\/strong\u003e 3.7μV\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended Headphone Impedance:\u003c\/strong\u003e 16-300Ω\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e 5V USB Type-C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 4.76 x 2 x 1.69 inches (121 x 51 x 43mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.84 lb (380g)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Fosi","offers":[{"title":"Default Title","offer_id":47164018196637,"sku":null,"price":129.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0241\/8111\/2928\/files\/FOSI-audio-SK02-DesktopDACHeadphoneAmplifier_2.jpg?v=1757437342"},{"product_id":"fosi-zd3","title":"Fosi Audio ZD3 Desktop DAC | Preamp | Fully Balanced","description":"\u003cul\u003e\n\u003cli\u003eFully balanced desktop DAC with high-performance ESS ES9039Q2M chip, supporting PCM up to 32-bit\/768kHz and DSD512 for exceptional audio clarity.\u003c\/li\u003e\n\u003cli\u003eVersatile connectivity with USB, HDMI ARC, optical, coaxial, and Bluetooth 5.0 inputs, plus XLR and RCA outputs for flexible system integration.\u003c\/li\u003e\n\u003cli\u003eUltra-low distortion (THD+N \u0026lt;0.00008%) and high signal-to-noise ratio (SNR ≥126dB) for pristine, noise-free sound reproduction.\u003c\/li\u003e\n\u003cli\u003eSwappable DIP8 dual op-amps (e.g., LME49720, MUSES02, SS3602) for customizable audio signatures tailored to personal preferences.\u003c\/li\u003e\n\u003cli\u003e1.5-inch OLED display and infrared remote for intuitive control and real-time audio setting feedback.\u003c\/li\u003e\n\u003cli\u003ePreamp bypass mode for pure DAC output and 12V trigger in\/out for synchronized power management with other audio devices.\u003c\/li\u003e\n\u003cli\u003eCompact aluminum alloy chassis with a modern design, ideal for desktop setups and seamless pairing with Fosi Audio ZA3 amplifier.\u003c\/li\u003e\n\u003cli\u003ePlug-and-play compatibility with Windows, Mac, and Linux systems, with no drivers required for most setups.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe Fosi Audio ZD3 is a fully balanced desktop DAC and preamplifier engineered to deliver audiophile-grade sound quality in a compact, user-friendly package. Featuring the advanced ESS ES9039Q2M DAC chip, it supports high-resolution audio formats up to PCM 32-bit\/768kHz and DSD512, ensuring every detail of your music is reproduced with precision and depth. With a comprehensive range of inputs—including USB, HDMI ARC, optical, coaxial, and Bluetooth 5.0—and outputs like balanced XLR and single-ended RCA, the ZD3 integrates seamlessly into various home audio setups, from desktop systems to full home theater configurations. Its sleek design, intuitive controls, and robust feature set make it an ideal choice for audiophiles seeking high performance without complexity. Whether you’re streaming lossless music, connecting to a TV, or building a high-fidelity audio chain, the ZD3 elevates your listening experience with clarity and versatility.\u003c\/p\u003e\n\u003ch3\u003eHigh-Performance Audio Processing\u003c\/h3\u003e\n\u003cp\u003eAt the core of the Fosi Audio ZD3 is the ESS Sabre ES9039Q2M DAC chip, paired with an XMOS XU316 USB interface for precise digital signal processing. This combination supports ultra-high-resolution audio, including PCM up to 32-bit\/768kHz and native DSD512 via USB, delivering unparalleled clarity and dynamic range. The ZD3 achieves a signal-to-noise ratio (SNR) of ≥126dB and an exceptionally low total harmonic distortion plus noise (THD+N) of \u0026lt;0.00008%, ensuring near-perfect sound reproduction with minimal noise or distortion. Its dynamic range of ≥123dB and noise floor of ≤2μV allow subtle musical details to shine through, making it ideal for high-resolution audio files and critical listening. The fully balanced circuit design further reduces interference and crosstalk, providing a clean, immersive soundstage that rivals more expensive DACs. Whether you’re listening to classical music or modern recordings, the ZD3 faithfully reproduces every nuance with stunning accuracy.\u003c\/p\u003e\n\u003ch3\u003eVersatile Connectivity Options\u003c\/h3\u003e\n\u003cp\u003eThe ZD3 offers a wide array of connectivity options to accommodate modern and traditional audio sources. Inputs include USB-B for direct computer connections, HDMI ARC for TV integration (supporting PCM up to 24-bit\/192kHz, but not Dolby or DTS), optical and coaxial for CD players or other digital devices, and Bluetooth 5.0 with support for SBC, AAC, aptX, and aptX HD codecs for high-quality wireless streaming. Outputs feature balanced XLR for professional-grade equipment and RCA for standard amplifiers or powered speakers, with output levels of 5Vrms and 2.5Vrms, respectively. The inclusion of 12V trigger in\/out allows synchronized power control with compatible devices like the Fosi Audio ZA3 amplifier, streamlining your audio setup. This versatility makes the ZD3 a central hub for diverse audio systems, from minimalist desktop rigs to complex home theater configurations, ensuring compatibility with devices like PCs, TVs, and streaming players.\u003c\/p\u003e\n\u003ch3\u003eCustomizable Audio Experience\u003c\/h3\u003e\n\u003cp\u003eThe Fosi Audio ZD3 stands out with its swappable DIP8 dual op-amp design, allowing users to tailor the sound signature to their preferences. It comes equipped with three LME49720 op-amps (two for XLR, one for RCA), but users can replace them with compatible options like NE5532, MUSES02, or SS3602 to achieve warmer, brighter, or neutral tonal characteristics. This feature caters to audiophiles who enjoy experimenting with their audio setup to match specific genres or headphones. Additionally, the preamp bypass mode enables the ZD3 to function purely as a DAC, delivering an unaltered signal for purists or those integrating it with external preamplifiers. The 1.5-inch OLED display provides clear, real-time feedback on input selection, volume, and sampling rates, while the included infrared remote simplifies operation from a distance, enhancing user convenience without compromising performance.\u003c\/p\u003e\n\u003ch3\u003eUser-Friendly Design and Controls\u003c\/h3\u003e\n\u003cp\u003eDesigned for ease of use, the ZD3 features a prominent orange knob for volume and menu navigation, complemented by a 1.5-inch OLED display that clearly shows input modes, sampling rates, and volume levels. The infrared remote control allows effortless adjustments from across the room, including input switching and volume control, with HDMI ARC mode supporting TV remote volume adjustments via CEC (note: eARC is not supported). The 12V trigger in\/out ensures seamless integration with other audio components, automatically powering on or off connected devices for a cohesive system experience. A bypass switch allows users to toggle between preamp and pure DAC modes, catering to different use cases. The ZD3’s plug-and-play functionality supports Windows 7\/8\/8.1\/10\/11 (driver may be required for some versions), Mac OS X, and Linux without additional software, making setup straightforward for all users.\u003c\/p\u003e\n\u003ch3\u003eRobust Build and Aesthetic Appeal\u003c\/h3\u003e\n\u003cp\u003eThe Fosi Audio ZD3 is housed in a compact, CNC-machined aluminum alloy chassis measuring 6.1 x 7.24 x 2.01 inches and weighing 2.65 pounds, offering durability and a premium aesthetic that complements modern audio setups. Its sleek black finish and minimalist design align with the Fosi Audio ZA3 amplifier, creating a visually cohesive stack for home audio systems. The robust construction ensures effective heat dissipation and resistance to wear, making it suitable for long-term use in desktop or living room environments. The ZD3’s solid build quality, combined with a 24-month warranty and lifetime customer support, provides peace of mind for users investing in a high-performance DAC. Its compact size makes it an excellent fit for space-constrained setups, while its professional-grade components ensure reliability and longevity.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e ZD3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChipset:\u003c\/strong\u003e ESS ES9039Q2M (DAC), XMOS XU316 (USB), Qualcomm QCC3031 (Bluetooth), LME49720 (Op-Amps)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInputs:\u003c\/strong\u003e USB-B, HDMI ARC, Optical, Coaxial, Bluetooth 5.0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutputs:\u003c\/strong\u003e XLR (Balanced), RCA (Single-Ended), 12V Trigger Out\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupported Formats (USB):\u003c\/strong\u003e PCM 32-bit\/768kHz, DSD512\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupported Formats (Optical\/Coaxial):\u003c\/strong\u003e PCM 24-bit\/192kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupported Formats (HDMI ARC):\u003c\/strong\u003e PCM 24-bit\/192kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupported Formats (Bluetooth):\u003c\/strong\u003e PCM 24-bit\/48kHz (SBC, AAC, aptX, aptX HD)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Level:\u003c\/strong\u003e XLR: 5Vrms; RCA: 2.5Vrms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal-to-Noise Ratio (SNR):\u003c\/strong\u003e ≥126dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal Harmonic Distortion + Noise (THD+N):\u003c\/strong\u003e \u0026lt;0.00008%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDynamic Range:\u003c\/strong\u003e ≥123dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNoise Floor:\u003c\/strong\u003e ≤2μV\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 20Hz-20kHz (±0.1dB)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth Version:\u003c\/strong\u003e 5.0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth Range:\u003c\/strong\u003e ≥13m (42.65ft)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e DC 12V\/1.5A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOp-Amps:\u003c\/strong\u003e 3x LME49720 (replaceable; 2 for XLR, 1 for RCA)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 6.1 x 7.24 x 2.01 inches (16 x 15.5 x 4.8 cm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.65 lbs (1.2 kg)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e ZD3 DAC, 12V Power Adapter, Infrared Remote, USB-A to USB-B Cable, 3.5mm Trigger Cable, User Manual\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Fosi","offers":[{"title":"Default Title","offer_id":47164031107229,"sku":null,"price":279.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0241\/8111\/2928\/files\/FosiAudioZD3FullyBalancedDesktopDAC_1.webp?v=1757435735"},{"product_id":"fosi-k7","title":"Fosi Audio K7 Headphone Amp | Preamp | DAC","description":"\u003cul\u003e\n\u003cli\u003eVersatile HiFi and gaming DAC\/headphone amplifier with AKM AK4493SEQ chip, supporting PCM up to 32-bit\/384kHz and DSD256 for high-resolution audio.\u003c\/li\u003e\n\u003cli\u003ePowerful headphone output delivering 2100mW per channel at 32 ohms via 4.4mm balanced, suitable for headphones and IEMs from 16 to 300 ohms.\u003c\/li\u003e\n\u003cli\u003eComprehensive connectivity with USB-C, optical, coaxial, Bluetooth 5.0 (aptX HD\/LL), and 3.5mm microphone input, plus 3.5mm, 4.4mm, and RCA outputs.\u003c\/li\u003e\n\u003cli\u003eUltra-low distortion (THD+N \u0026lt;0.0002%) and high SNR (≥121dB) for clean, detailed sound with a noise floor below 6.5μV.\u003c\/li\u003e\n\u003cli\u003eUser-friendly design with dual large knobs, five tactile buttons, and a 1.5-inch LCD for intuitive control and real-time status display.\u003c\/li\u003e\n\u003cli\u003eAdjustable bass and treble controls with bypass mode, plus high\/low gain settings for tailored audio output.\u003c\/li\u003e\n\u003cli\u003eBuilt-in noise-canceling microphone input for clear voice communication, ideal for gaming and online calls (USB UAC 1.0 mode only).\u003c\/li\u003e\n\u003cli\u003eDurable CNC-machined aluminum alloy chassis with a 5° angled design for ergonomic operation and enhanced durability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe Fosi Audio K7 is a high-performance desktop DAC and headphone amplifier designed to bridge the gap between audiophile-grade music listening and immersive gaming audio. Developed with feedback from over 100 HiFi and gaming enthusiasts, it combines a premium AKM AK4493SEQ DAC chip with a robust TPA6120A2 amplifier, delivering up to 2100mW per channel through its 4.4mm balanced output. Supporting PCM up to 32-bit\/384kHz and DSD256 via USB, the K7 ensures pristine audio reproduction for high-resolution music files. Its versatile inputs—USB-C, optical, coaxial, Bluetooth 5.0—and outputs (3.5mm, 4.4mm, RCA) make it a central hub for desktops, gaming consoles like PS5, and other devices. With a noise-canceling microphone input, adjustable tone controls, and an intuitive interface, the K7 caters to both audiophiles and gamers seeking a compact, powerful solution for music, gaming, and multimedia.\u003c\/p\u003e\n\u003ch3\u003eExceptional Audio Performance\u003c\/h3\u003e\n\u003cp\u003eThe Fosi Audio K7 is built around the AKM AK4493SEQ DAC chip, paired with an XMOS XU208 USB controller, to deliver high-resolution audio decoding up to PCM 32-bit\/384kHz and DSD256 via USB, with optical and coaxial inputs supporting up to 24-bit\/192kHz. This setup achieves an ultra-low total harmonic distortion plus noise (THD+N) of \u0026lt;0.0002%, a signal-to-noise ratio (SNR) of ≥121dB, and a dynamic range of ≥121dB, ensuring a clean, detailed soundstage with a noise floor as low as 6.5μV for balanced output. The fully balanced circuitry, enhanced by OPA1612 op-amps and TPA6120A2 amplifier chips, minimizes interference and crosstalk, delivering crystal-clear audio for both music and gaming. Whether you’re enjoying lossless tracks or detecting subtle in-game audio cues, the K7’s audiophile-grade components provide a rich, natural sound that elevates every listening experience.\u003c\/p\u003e\n\u003ch3\u003ePowerful Amplification for Diverse Headphones\u003c\/h3\u003e\n\u003cp\u003eThe K7’s headphone amplifier section is designed to drive a wide range of headphones and in-ear monitors, from 16 to 300 ohms, with ease. The 4.4mm balanced output delivers up to 2100mW per channel at 32 ohms (THD+N \u0026lt;1%), while the 3.5mm single-ended output provides 600mW per channel at 32 ohms. High and low gain settings (+18.7dB and +13.8dB for balanced, +12.6dB and +7.8dB for single-ended) allow precise matching to headphone sensitivity, ensuring optimal performance for sensitive IEMs or power-hungry planar magnetics. The K7’s robust power output ensures dynamic headroom for punchy bass and crisp highs, making it ideal for immersive gaming audio or detailed music playback. Its balanced output enhances soundstage width and channel separation, offering a competitive edge in games and a refined experience for audiophiles.\u003c\/p\u003e\n\u003ch3\u003eVersatile Connectivity and Gaming Features\u003c\/h3\u003e\n\u003cp\u003eThe K7 excels in connectivity, offering USB-C, optical, coaxial, and Bluetooth 5.0 inputs with support for aptX HD, aptX LL, aptX, AAC, and SBC codecs, delivering up to 24-bit\/48kHz wireless audio with under 40ms latency. The 3.5mm microphone input, equipped with noise-canceling algorithms, ensures clear voice communication for online gaming or virtual meetings, though it’s limited to USB UAC 1.0 mode (16-bit\/48kHz) to avoid conflicts with high-resolution playback. Outputs include 3.5mm single-ended, 4.4mm balanced, and RCA for connecting to external amplifiers or powered speakers. The K7 supports UAC 1.0 for compatibility with gaming consoles like PS5 and Switch, and UAC 2.0 for high-resolution audio on PCs and Macs. This flexibility makes it a versatile hub for desktops, home theater systems, or gaming setups, seamlessly integrating with devices like PCs, TVs, and projectors.\u003c\/p\u003e\n\u003ch3\u003eIntuitive Controls and User Experience\u003c\/h3\u003e\n\u003cp\u003eFosi Audio’s K7 keeps everyday control intuitive, with two oversized knurled knobs for volume and tone plus five shortcut buttons for power\/UAC, input, output, EQ-bypass and tone-mode; a crisp 1.5-inch OLED screen displays input source, sample rate, volume and mic status in real time; the tone section allows ±12 dB bass and ±6 dB treble adjustment with a bypass option for an uncoloured path; the angled aluminium chassis measures 155 × 95 × 55 mm (≈ 6.1 × 3.74 × 2.17 in), compact enough for desktop use; power is provided by a dedicated 12 V \/ 2 A adapter to isolate USB noise, while XMOS firmware can be updated via USB-C to ensure future expandability.\u003c\/p\u003e\n\u003ch3\u003eRobust Build and Aesthetic Design\u003c\/h3\u003e\n\u003cp\u003eCrafted from CNC-machined aluminum alloy, the Fosi Audio K7 combines durability with a sleek, modern aesthetic. Its all-metal chassis, weighing 1.16 pounds (527g), features a black finish and rounded corners, offering a premium feel and enhanced electromagnetic interference shielding. The angled top plate and grippy rubber feet ensure stability and accessibility, while the robust construction protects against wear and supports heavy daily use. Triple intelligent protection circuits (overheat, overload, overcurrent) safeguard the device during extended gaming or listening sessions. Backed by a 24-month warranty and comprehensive customer support, the K7 is built to last, making it a reliable addition to any audio setup, from minimalist desktops to advanced HiFi systems.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e K7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChipset:\u003c\/strong\u003e AKM AK4493SEQ (DAC), XMOS XU208 (USB), Qualcomm QCC3031 (Bluetooth), TPA6120A2 (Amplifier), OPA1612 (Op-Amp)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInputs:\u003c\/strong\u003e USB-C, Optical, Coaxial, Bluetooth 5.0, 3.5mm Microphone\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutputs:\u003c\/strong\u003e 3.5mm Single-Ended Headphone, 4.4mm Balanced Headphone, RCA Line Out\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupported Formats (USB):\u003c\/strong\u003e PCM 32-bit\/384kHz, DSD256\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupported Formats (Optical\/Coaxial):\u003c\/strong\u003e PCM 24-bit\/192kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupported Formats (Bluetooth):\u003c\/strong\u003e PCM 24-bit\/48kHz (SBC, AAC, aptX, aptX HD, aptX LL)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeadphone Output Power (4.4mm Balanced):\u003c\/strong\u003e 2100mW + 2100mW @ 32Ω (THD+N \u0026lt;1%)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeadphone Output Power (3.5mm Single-Ended):\u003c\/strong\u003e 600mW + 600mW @ 32Ω (THD+N \u0026lt;1%)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGain (4.4mm Balanced):\u003c\/strong\u003e High: +18.7dB, Low: +13.8dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGain (3.5mm Single-Ended):\u003c\/strong\u003e High: +12.6dB, Low: +7.8dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal-to-Noise Ratio (SNR):\u003c\/strong\u003e ≥121dB (4.4mm), ≥122dB (3.5mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal Harmonic Distortion + Noise (THD+N):\u003c\/strong\u003e \u0026lt;0.0002%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDynamic Range:\u003c\/strong\u003e ≥121dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNoise Floor:\u003c\/strong\u003e ≤6.5μV (4.4mm), ≤2.5μV (3.5mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 20Hz-20kHz (±0.1dB)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended Headphone Impedance:\u003c\/strong\u003e 16-300Ω\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth Version:\u003c\/strong\u003e 5.0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth Range:\u003c\/strong\u003e ≤13m (42.65ft)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e DC 12V\/2A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 6.1 x 3.54 x 1.97 inches (155 x 90 x 50mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.16 lbs (527g)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Aluminum Alloy\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e K7 DAC\/Amp, 12V\/2A Power Adapter, USB-C to USB-C Cable with USB-A Adapter, Bluetooth Antenna, 3.5mm Mic\/Headphone Splitter\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Fosi","offers":[{"title":"Default Title","offer_id":47165596565661,"sku":null,"price":249.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0241\/8111\/2928\/files\/FosiAudioK7DesktopDACHeadphoneAmplifier_6.jpg?v=1757434354"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0241\/8111\/2928\/collections\/fosi-audio-brand-banner.jpg?v=1758131121","url":"https:\/\/en.pifferia.com\/collections\/fosi-audio.oembed","provider":"Pifferia Global","version":"1.0","type":"link"}