Fosi Audio K5 Pro
- Fosi Audio
Fosi Audio K5 Pro
- Fosi Audio
$54.47
- 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
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Official product information provided by Fosi Audio
The following product descriptions, specifications and images are provided by the manufacturer.
Fosi Audio K5 Pro is a compact gaming DAC and headphone amplifier with USB, optical and coaxial digital inputs.
A microphone input, RCA output, tone controls and strong 3.5mm headphone amplification provide one control point for PC, console and desktop audio.
Why it stands out
Gaming microphone support
A dedicated 3.5mm microphone input supports compatible PC and console communication setups.
Three digital source inputs
Switch between USB-C, optical and coaxial sources.
Powerful headphone output
Supports 16–300Ω headphones with up to 500mW at 32Ω.
Headphone and speaker integration
Use the 3.5mm headphone output or RCA output for powered speakers and amplifiers.
Best for
- PC and console gaming
- Desktop headphones and powered speakers
- TVs with optical PCM output
- Users wanting physical bass and treble controls
Not ideal for
- High-resolution playback above 24-bit/192kHz
- Balanced headphone connections
- Passive speakers without a power amplifier
EMiUZEK Buying Notes
- The microphone function works in USB mode and is not available from optical or coaxial inputs.
- USB playback is limited to 24-bit/96kHz; optical and coaxial support up to 24-bit/192kHz.
- K5 Pro does not power passive speakers directly; connect RCA to powered speakers or an amplifier.
Frequently asked questions
Can it be used with PS5?
Yes, through a compatible USB connection and system audio settings.
Does the microphone work with optical input?
No. Microphone support is for USB mode.
Can it drive 300Ω headphones?
Yes, the official recommended range is 16–300Ω.
Can it connect to powered speakers?
Yes, through RCA output.
Does it support balanced headphones?
No. The headphone output is 3.5mm single-ended.
Can it decode Dolby or DTS from a TV?
Use PCM output; multichannel encoded formats are not supported.
HOW TO CONNECT
PC gaming
Source icon: computer
Source: PC / Mac
Connection: USB-C audio + microphone
Output connection: 3.5mm headphone output
Target icon: headphones
Output: Gaming headset / headphones
Console gaming
Source icon: device
Source: Compatible console
Connection: USB audio
Output connection: 3.5mm headphone output
Target icon: headphones
Output: Gaming headset / headphones
TV and speaker system
Source icon: tv
Source: TV
Connection: Optical PCM
Output connection: RCA output
Target icon: speakers
Output: Powered speakers or amplifier
Technical Specifications
Inputs and outputs
| Feature | Specification |
|---|---|
| Inputs | USB-C; optical; coaxial; 3.5mm microphone |
| Outputs | 3.5mm headphone; RCA line output |
| Recommended headphone impedance | 16–300Ω |
Digital and headphone performance
| Feature | Specification |
|---|---|
| USB maximum | 24-bit / 96kHz |
| Optical/coaxial maximum | 24-bit / 192kHz |
| Output power | 1000mW @ 16Ω; 500mW @ 32Ω; 300mW @ 64Ω; 150mW @ 128Ω; 80mW @ 300Ω |
| SNR | ≥110dB |
| THD | ≤0.003% |
| Power input | DC 5V via USB-C |
Additional Product Content
Comparison: Which Fosi Audio model is right for you?
| Model | K5 Pro | Q4 | K7 |
|---|---|---|---|
| Primary use | Gaming DAC with microphone | Simple desktop DAC/headphone amp | Premium HiFi and gaming DAC |
| Inputs | USB, optical, coaxial, microphone | USB, optical, coaxial | USB, optical, coaxial, Bluetooth, microphone |
| Headphone output | 3.5mm | 3.5mm | 3.5mm and 4.4mm balanced |
| Maximum USB playback | 24-bit / 96kHz | 24-bit / 96kHz | 32-bit / 384kHz; DSD256 |
| Best use | Budget gaming communication | Basic music and TV upgrade | High-output balanced desktop system |
What's in the box, manuals and downloads
Shipping, warranty and returns
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All products sold by EMIUZEK are genuine products with manufacturer warranty support.
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Eligible returns are available according to our return policy.
Please contact EMIUZEK before returning any product so we can provide assistance.