- Upgraded USB-C portable headphone DAC and amplifier supporting up to DSD256 and PCM 32bit/384kHz decoding for high-resolution audio playback.
- Powerful output delivering 128mW at 32Ω for single-ended and 510mW at 32Ω for balanced connections, suitable for a wide range of headphones.
- Dual Cirrus Logic CS43131 DAC chips providing ultra-low distortion with 0.0002% THD+N, 130dB SNR, and exceptional dynamic range.
- Independent 60-step volume control with memory function for precise and convenient adjustments.
- Broad compatibility with iOS, Android, Windows, and Mac devices, functioning as an external sound card.
- Durable CNC-machined metal construction for shock resistance and comfortable handling.
- Supports 3.5mm single-ended and 4.4mm balanced headphone outputs for versatile connectivity.
Product Overview
The 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.
Superior Sound Quality and Performance
At 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.
Powerful Amplification for Demanding Headphones
The 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.
User-Friendly Features and Controls
Simplicity 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.
Wide Compatibility and Versatility
The 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.
Build Quality and Durability
Crafted 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.
Specifications
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DAC Chip: Dual CS43131
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Decoding Support: PCM up to 32bit/384kHz, DSD64/128/256
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Output Power: Single-Ended (3.5mm): 128mW @ 32Ω; Balanced (4.4mm): 510mW @ 32Ω
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Signal-to-Noise Ratio (SNR): 130dB
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Dynamic Range: 130dB
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Total Harmonic Distortion + Noise (THD+N): 0.0002%
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Frequency Response: 20Hz-20kHz ±0.5dB
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Recommended Headphone Impedance: 16-300Ω (both SE and BAL)
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Input: USB Type-C
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Outputs: 3.5mm Single-Ended, 4.4mm Balanced
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Compatibility: Mac, Windows, iOS, Android
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Dimensions: Compact portable design
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Weight: 90g
