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The Fosi Audio DS1 is a premium portable USB DAC and headphone amplifier designed to transform your smartphone, tablet, or laptop into a high-end audio player. By bypassing the inferior internal sound cards of standard devices, the DS1 delivers a clean, high-resolution sonic experience that satisfies the most demanding audiophiles.
Dual ES9318 Chips: At the core of the DS1 are two high-performance ESS Sabre ES9318 DAC chips. This dual-mono configuration ensures exceptional channel separation, a wider soundstage, and ultra-low total harmonic distortion.
True High-Res Decoding: Supports native DSD512 and PCM up to 32-bit/768kHz, allowing you to enjoy master-quality audio files with absolute precision and no detail loss.
Dual Headphone Jacks: Features both a 3.5mm single-ended and a 4.4mm balanced output. The balanced port provides significantly higher power and a lower noise floor, making it capable of driving demanding full-sized headphones.
Exceptional Driving Power: Despite its miniature size, the DS1 pumps out up to 220mW @32Ω (Balanced), ensuring your headphones have the headroom they need for dynamic and punchy sound.
CNC Aluminum Enclosure: The sleek, sandblasted aluminum alloy body not only looks professional but also acts as a shield against electromagnetic interference (EMI).
Plug-and-Play Simplicity: Compatible with Android, iOS, Windows, and macOS. The detachable USB-C cable design allows for easy switching between different devices and cable upgrades.
| Component | Specification |
| DAC Chip | Dual ESS Sabre ES9318 |
| Decoding Support | PCM 32Bit/768kHz, DSD512 |
| Output Power | 220mW @32Ω (Balanced), 120mW @32Ω (Single-ended) |
| Input Interface | USB Type-C |
| Output Interface | 3.5mm SE, 4.4mm Balanced |
| SNR / THD+N | 120dB / 0.0006% |
| Compatibility | Windows/Mac/Android/iOS |
The Fosi Audio DS1 bridges the gap between portability and professional performance. It is an essential tool for music lovers who want a significant audio upgrade without carrying a bulky desktop setup. With its balanced architecture and top-tier ESS chips, the DS1 offers a level of musicality and transparency that is rare at this price point.
Balanced, Warm, and Natural Sound
ln addition to being balanced and warm, the timbre is able to bring peace to the listener. it
has a rather daring sound texture and feels comfortable. Your ears will enjoy pure music with
natural timbre, rich low frequency, transparent medium frequency, and high frequency.
Frequency response:20Hz-20kHz (±0.5dB)
*THD+N:SE:0.00069(320}:; BAL:0.0019(320); S/N: 2120 dB
Recommended headphone impedance:16-300Ω(SE);16-300Ω(BAL)
Dual headphone outputs: 3.5mm single-ended and 4.4mm balanced headphone jack;
The DS1 DAC headphone amplifier builds in an oscillator to get a stable signaland good quality audio sound.
The Fosi Audio DS1 acts as a professional-grade external DAC and amplifier that bypasses the limited audio hardware of standard smartphones and laptops. By processing digital audio signals externally, it significantly reduces electromagnetic interference and noise. This provides a cleaner background, enhanced dynamic range, and much greater clarity, allowing you to enjoy high-resolution streaming services as they were meant to be heard.
Despite its portable form factor, the DS1 is a powerhouse. It features a robust amplification circuit designed to drive everything from high-sensitivity In-Ear Monitors (IEMs) to demanding full-sized studio headphones. It provides the necessary current and voltage to maintain control over headphone drivers, ensuring deep, impactful bass and crisp high frequencies even with power-hungry gear.
Yes, the DS1 is equipped with dual headphone outputs: a standard 3.5mm single-ended port and a 4.4mm balanced port. The 4.4mm balanced output is a favorite among audiophiles as it offers higher power output and superior channel separation. This results in an even wider soundstage and more precise instrument imaging compared to traditional single-ended connections.
Absolutely. The DS1 features a universal USB-C interface, making it "plug-and-play" compatible with a vast range of devices, including Android smartphones, tablets, macOS, and Windows PCs. It is also an ideal companion for the latest iPhone 15 and 16 series. Because it adheres to UAC 2.0 standards, no manual driver installation is required for most modern operating systems.
Yes, the DS1 is engineered for the high-res era. It natively supports DSD (Direct Stream Digital) and high-bitrate PCM formats, allowing it to decode ultra-high-definition audio files without downsampling. When paired with high-quality sources like Tidal, Qobuz, or local FLAC files, the DS1 ensures a bit-perfect audio transmission for a truly transparent listening experience.
