Fosi Audio DS2
- 15 reviews
- Fosi Audio
Fosi Audio DS2
- 15 reviews
- Fosi Audio
$50.29
- Authorized Dealer · Tech Support · 30-Day Returns
Why it stands out
Best for
Not ideal for
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Setup guide
How to connect
What you should know
EMiUZEK buying notes
Frequently asked questions
View full technical specifications
Official product information provided by Fosi Audio
The following product descriptions, specifications and images are provided by the manufacturer.
Fosi Audio DS2 (2024) is a portable USB DAC and headphone amplifier for mobile devices and computers.
Dual CS43131 DACs, independent volume control and 3.5mm plus 4.4mm outputs deliver clean, powerful wired headphone playback in a compact dongle.
Why it stands out
Dual CS43131 DAC architecture
The current 2024 version uses two Cirrus Logic DAC chips for low-noise conversion.
Strong balanced output
The 4.4mm output provides substantially more power than the single-ended connection.
Independent hardware volume
Dedicated buttons allow finer adjustment without relying only on the source device.
High-resolution playback
Supports PCM up to 32-bit/384kHz and DSD256.
Best for
- USB-C phone and tablet listening
- Windows and Mac headphone systems
- Sensitive IEMs and full-size wired headphones
- Users needing 3.5mm and 4.4mm outputs
Not ideal for
- Bluetooth or wireless headphones
- Headsets requiring microphone support
- Users expecting an internal battery
EMiUZEK Buying Notes
- This listing is for the DS2 2024 version with dual CS43131 DACs; older DS2 specifications do not apply.
- DS2 draws power from the connected source and can feel warm during normal operation.
- Lightning devices require a compatible Lightning-to-USB-C OTG cable that may be sold separately.
Frequently asked questions
Which DAC chips are used?
The current DS2 2024 uses dual CS43131 DACs.
What is the maximum resolution?
PCM up to 32-bit/384kHz and DSD256.
Does it have a battery?
No. It is powered by the connected USB device.
Can it drive 4.4mm balanced headphones?
Yes, with compatible balanced-wired headphones.
Can I use a 3.5mm-to-4.4mm adapter?
No. Use headphones terminated correctly for the selected output.
Why does it feel warm?
A moderate temperature rise is normal during high-resolution or higher-output operation.
HOW TO CONNECT
USB-C phone listening
Source icon: phone
Source: USB-C phone / tablet
Connection: USB-C audio
Output connection: 3.5mm output
Target icon: headphones
Output: Wired headphones or IEMs
Balanced portable listening
Source icon: phone
Source: USB-C phone / player
Connection: USB-C audio
Output connection: 4.4mm balanced output
Target icon: headphones
Output: Balanced headphones
Computer headphone system
Source icon: computer
Source: Windows PC / Mac
Connection: USB audio
Output connection: 3.5mm or 4.4mm output
Target icon: headphones
Output: Wired headphones
Technical Specifications
Audio architecture
| Feature | Specification |
|---|---|
| Product type | Portable USB DAC and headphone amplifier |
| DAC chipset | Dual CS43131 |
| Maximum PCM | 32-bit / 384kHz |
| DSD | DSD64 / 128 / 256 |
Outputs and performance
| Feature | Specification |
|---|---|
| Headphone outputs | 3.5mm single-ended; 4.4mm balanced |
| Output power | 128mW @ 32Ω single-ended; 170mW @ 32Ω balanced |
| Recommended impedance | 16–300Ω |
| SNR | ≥130dB |
| THD+N | <0.0002% |
Additional Product Content
Comparison: Which Fosi Audio model is right for you?
| Model | DS1 | DS2 2024 | DS3 |
|---|---|---|---|
| Primary use | Portable Hi-Res music | Portable Hi-Res music | Music and gaming spatial audio |
| DAC / processing | ESS ES9038Q2M | Dual CS43131 | Hardware 7.1 processing |
| Maximum PCM | 32-bit / 768kHz | 32-bit / 384kHz | 32-bit / 768kHz |
| Maximum DSD | DSD512 | DSD256 | DSD512 |
| Maximum stated output | 220mW @ 32Ω balanced | 510mW @ 32Ω balanced (manual) | 220mW @ 32Ω |
| Best use | Compact ESS dongle | Higher-power balanced portable setup | Gaming effects and spatial audio |
What's in the box, manuals and downloads
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Please contact EMIUZEK before returning any product so we can provide assistance.