Transform your mobile and desktop listening with the Fosi Audio DS2. Powered by dual Cirrus Logic CS43131 DAC chips, this compact USB dongle delivers up to 170mW per channel through 3.5mm single-ended and 4.4mm balanced connections, bringing low-noise, high-resolution audio decoding to smartphones, tablets, and computers.

Key Features

* Dual Flagship Cirrus Logic DACs
Featuring two next-generation CS43131 DAC chips working in a balanced differential configuration, the DS2 decodes PCM up to 32-bit/384kHz and native DSD256 with an extraordinary 130 dB signal-to-noise ratio and ultra-low distortion.

* High Output Power with Dual Jacks
Offers both a standard 3.5mm single-ended output and a 4.4mm balanced headphone output, providing strong drive capability for in-ear monitors and full-sized headphones with impedances ranging from 16 Ohms to 300 Ohms.

* 60-Step Hardware Volume Adjustment
Take precise control over your listening levels with independent physical volume buttons featuring 60 fine steps and automatic volume memory retention.

* Ultra-Low Noise Floor and Efficient Power Draw
Engineered with a noise floor under 1 microvolt and a total harmonic distortion of 0.0001 percent, the DS2 delivers pure, dark backgrounds while remaining power-efficient to protect your phone battery.

* Precision CNC Aluminum Housing
Constructed from a solid block of aluminum alloy using CNC machining, the durable metal body effectively shields internal audio circuitry from electromagnetic interference while remaining light in hand.

* Universal Plug-and-Play Compatibility
Works seamlessly across iOS, Android, Windows, and Mac operating systems without extra driver installation, functioning as a high-fidelity external sound card.

What is in the Box

* 1 x Fosi Audio DS2 Portable USB DAC Headphone Amplifier
* 1 x USB-C to USB-C Data Cable
* 1 x USB-C to USB-A Adapter
* 1 x User Manual

Technical Specifications

* DAC Chipset: Dual Cirrus Logic CS43131
* Output Power: 128mW @ 32 Ohms (Single-Ended), 170mW @ 32 Ohms (Balanced)
* Recommended Headphone Impedance: 16 Ohms to 300 Ohms
* Maximum Sampling Rate: PCM up to 32-bit/384kHz, Native DSD up to DSD256
* Signal-to-Noise Ratio: Greater than or equal to 130 dB
* SINAD: Greater than 109 dB
* Total Harmonic Distortion + Noise: Less than 0.0002 percent
* Noise Floor: Less than 1 microvolt
* Frequency Response: 20Hz - 20kHz (±0.5 dB)
* Inputs: USB Type-C
* Outputs: 3.5mm Single-Ended Headphone Jack, 4.4mm Balanced Headphone Jack
* Volume Control: 60-Step Independent Hardware Buttons
* Weight: 90.7g