Fosi Audio DS1
- 2 reviews
- Fosi Audio
Fosi Audio DS1
- 2 reviews
- Fosi Audio
$78.84
- 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 DS1 is a portable USB DAC and headphone amplifier for phones, tablets and computers.
An ESS ES9038Q2M DAC, 3.5mm single-ended and 4.4mm balanced outputs, and high-resolution decoding provide a compact upgrade for wired headphones.
Why it stands out
ESS ES9038Q2M conversion
A proven ESS DAC architecture supports detailed portable playback.
Dual headphone outputs
Connect conventional 3.5mm headphones or compatible 4.4mm balanced headphones.
High-resolution USB audio
Supports PCM up to 32-bit/768kHz and native DSD512.
Portable source-powered design
Runs from the connected USB device without a separate battery or charger.
Best for
- Wired headphone listening from USB-C phones
- Laptop and desktop USB audio
- Portable Hi-Res music systems
- Headphones requiring 3.5mm or 4.4mm output
Not ideal for
- Wireless Bluetooth listening
- Headsets requiring microphone or inline-control support
- Driving passive speakers
EMiUZEK Buying Notes
- DS1 has no battery and draws power from the connected source device.
- Use a compatible OTG adapter or cable for devices without USB-C; Lightning accessories may be required separately.
- Do not use a 3.5mm-to-4.4mm adapter with the balanced output.
Frequently asked questions
Does DS1 support both 3.5mm and 4.4mm headphones?
Yes, it provides separate 3.5mm single-ended and 4.4mm balanced outputs.
Does it include Bluetooth?
No. DS1 is a wired USB DAC/headphone amplifier.
Does it need charging?
No. It is powered by the connected USB source.
Can it work with Windows and Mac?
Yes. It supports Windows and macOS, subject to the source device and playback software.
Can it answer calls through a headset microphone?
No. It is intended for audio playback and does not provide headset microphone control.
Is warmth during use normal?
Some warmth is normal for a compact high-output USB DAC.
HOW TO CONNECT
USB-C phone listening
Source icon: phone
Source: USB-C phone / tablet
Connection: USB-C audio
Output connection: 3.5mm headphone output
Target icon: headphones
Output: Wired headphones
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: Compatible balanced headphones
Computer audio
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 | ESS ES9038Q2M |
| Maximum PCM | 32-bit / 768kHz |
| DSD | DSD64 / 128 / 256 / 512 |
Outputs and performance
| Feature | Specification |
|---|---|
| Headphone outputs | 3.5mm single-ended; 4.4mm balanced |
| Output power | 120mW @ 32Ω single-ended; 220mW @ 32Ω balanced |
| Recommended impedance | 16–300Ω |
| SNR | 120dB |
| Weight | 38g |
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
Shipping, warranty and returns
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We provide tracked international shipping with delivery options and estimated delivery times shown during checkout.
Official Warranty Support
All products sold by EMIUZEK are genuine products with manufacturer warranty support.
Our HiFi specialists provide assistance with compatibility, setup, and technical questions.
Easy Returns
Eligible returns are available according to our return policy.
Please contact EMIUZEK before returning any product so we can provide assistance.
