Fosi Audio DS2 Portable USB DAC Headphone Amplifier

Small Device. Big Sound. High-Resolution Listening.

Designed for music lovers who want high-quality audio wherever they go, the Fosi Audio DS2 is a compact USB DAC and headphone amplifier that combines powerful amplification, high-resolution decoding and an ultra-low noise floor in a portable design.

Featuring dual ESS ES9018K2M QUAD DAC chips, the DS2 supports PCM up to 32-bit/768kHz and DSD512, delivering detailed, clean and immersive sound from compatible smartphones, tablets and computers.

High-Resolution Audio

Experience more detail from your digital music.

The DS2 uses dual ESS ES9018K2M QUAD DAC chips for high-quality digital-to-analogue conversion, supporting PCM up to 32-bit/768kHz and DSD up to DSD512.

Its high-resolution architecture is designed to preserve the detail, dynamics and character of your music, making it an excellent upgrade for headphones and IEMs.

Powerful Headphone Amplification

Compact does not mean compromised.

The DS2 delivers up to 120mW at 32Ω through the 3.5mm output and up to 250mW at 32Ω through the 4.4mm balanced output, providing ample power for a wide range of headphones and IEMs.

With support for headphones from 16Ω to 300Ω, the DS2 offers the versatility needed for both portable earphones and more demanding headphones.

3.5mm & 4.4mm Balanced Outputs

Enjoy flexible connectivity for your headphones and IEMs.

The 3.5mm single-ended output provides broad compatibility, while the 4.4mm balanced output offers higher output power for compatible balanced headphones and IEMs.

Clean, Detailed Sound

Hear your music with clarity.

The DS2 features a 108dB signal-to-noise ratio and 108dB dynamic range, helping minimise unwanted background noise while preserving the clarity and detail of your music.

With its low-noise design, the DS2 is particularly well suited to sensitive IEMs and high-quality headphones.

Compact & Portable

High-resolution audio that fits in your pocket.

Weighing just 15g, the DS2 is designed for everyday portability. Its compact size makes it easy to use with smartphones, tablets, laptops and computers without adding unnecessary bulk.

The DS2 is powered directly through USB, so there is no internal battery to charge.

Wide Device Compatibility

Connect the DS2 to a variety of devices.

The DS2 is compatible with Mac, Windows, iOS and Android, making it suitable for both mobile and desktop listening.

Whether you're listening to music, watching movies, gaming or enjoying high-resolution recordings, the DS2 provides a simple way to upgrade your digital audio setup.

Why Choose the Fosi Audio DS2?

• Portable USB DAC and headphone amplifier
• Dual ESS ES9018K2M QUAD DAC chips
• Supports PCM up to 32-bit/768kHz
• Supports DSD64/128/256/512
• 3.5mm single-ended headphone output
• 4.4mm balanced headphone output
• Up to 120mW @ 32Ω via 3.5mm
• Up to 250mW @ 32Ω via 4.4mm balanced output
• Supports headphones from 16–300Ω
• 108dB SNR
• 108dB dynamic range
• Compact 15g design
• USB-powered with no internal battery
• Compatible with Mac, Windows, iOS and Android
• Ideal for headphones, IEMs, smartphones, tablets and computers