Fosi Audio K5 Pro Gaming DAC Headphone Amplifier Mini Hi-Fi Stereo Digital-to-Analog Audio Converter USB Type C/Optical/Coaxial to RCA/3.5MM AUX for PS5/PC/MAC/Computer

Price: $89.99 - $79.99

(as of Feb 18, 2026 04:55:37 UTC –

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Product description

USB DAC Born for Gaming Fosi Audio K5 Pro Stereo Gaming DAC Headphone Amplifier

The K5 Pro has a high-performance audio circuit designed by the Fosi Audio innovation product R&D team, allowing you to take advantage of digital audio with USB C/optical/coaxial inputs, convenient for connecting various digital interfactes, compatible with PS5/Computers, etc.

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Desktop Headphone Amp Merchant Video

the upgraded version of Fosi Audio Q4

Fosi Audio USB DAC Headphone Amp Combo

Input: USB-C/OPT/COA/3.5MM Microphone; Output: RCA/3.5mm HeadphoneOPT/COA Sampling Rate: up to 24bit/192 kHz;Output power: 1000mw@16Ω, 500mw@32Ω, 300mw@64Ω, 150mw@128Ω, 80mw@300Ω;THD: <0.003%; S/N: >110db; Frequency response: 20Hz-20kHzRecommended headphone impedance: 16-300Ω; Dimensions: 4.4×3.7×1.2 in(112x95x30mm).

practical and usefull

NEW DAC Headphone Amp

RCA output can be connected to an amplifier or powered speakers on your desktop.

outstanding performance

Exclusive Design with Independent Mic Input

Microphone interface can drive 16 Ohm to 300 Ohm headphones.

richer audio details

Great Sound Quality

Next-generation DAC for unrivaled performance to make your music sound great

rich and delicate sound

Gaming Starts Here

Converts USB Type C/Optical/Coaxial signals to 3.5MM AUX and RCA signals with low distortion

1 Mini Compact Desktop DAC

2 3.5 MM MIC Inputs

3 RCA Output

4 DAC Audio Converter

elegant grey exterior

Desktop DAC and Headphone Amplifier

The knobs are high quality and turn very smoothly, they’re quite enjoyable to use.

works with PS5 USB audio

Mini Stereo Gaming DAC

Great Value Headphone AMP/DAC with Bass/Treble Control

easy to install

Plug-n-play, No Driver Needed

If you have RCA speakers and want to connect them to a computer, get this device!

RCA ouput

Great sound quality

Next-generation DAC for unrivalled performance, make your music sound great at home on your desk.

1 with Bass Treble Control

2 Perfect for Gaming System

3 Desktop DAC Preamp

4 Richer Audio Details

Is the K5 Pro driverless on Windows 7?

Yes, it is driverless.

What’s the sample rate of USB/Optical/Coaxial?

USB supports up to 24-bit 96 KHz, while Optical and Coaxial support up to 24-bit 192 KHz.

My K5 Pro won’t turn on with my iPhone 14.

Ensure you are using a USB-C to Lightning OTG cable. For devices that may not output enough power, try using an additional USB splitter cable for power supply.

Unable to Power On.

To power on the device, press and hold the volume button for a longer time.

How to use K5 PRO with PS5?

Plug headset into K5 Pro via 3.5mm splitter. Go to PS5 Settings > Sound > Audio Output, select Output Device > Fosi Audio K5PRO. Adjust mic level to optimal range. Ensure PS5 output/input set to Fosi Audio K5PRO.

Friendly Solutions Guide for Fosi Audio K5 Pro

Function Issue Solutions: 1. To mute speakers while using headphones, either turning the speaker’s own volume to zero, or unplug the RCA cable. 2.Single Side Audio/Unresponsive Port: Replace earphones with a known – good pair. Check if the plug matches the jack and is fully inserted. Verify the audio output settings on your device to ensure it’s set to “K5 Pro”. 3. No Sound/Device Not Working: In USB mode, ensure the output device in Windows Control Panel is “Fosi Audio K5 PRO”. For OPT/COA connections, confirm correct port connections and set the K5 Pro to the corresponding mode. Also, configure the TV’s audio output to PCM mode and disable other audio effects. Check for damaged cables and ensure the device is powered on by long – pressing the volume button for over 2 seconds.

Audio Sound Issue Solutions

– Noise Issue: Check the audio source and lower the volume to see if noise disappears. Use well – shielded USB OTG cables and keep them away from AC power cables. Replace poor or damaged audio cables with high – quality ones and test with different outputs. Switch input modes to see if noise decreases. For headphone noise, try using a 3.5mm ground loop isolator and high – impedance headphones.

– Electric Current Issue: Replace cables with well – shielded ones and ensure they are away from AC power cables. Correct all connections to avoid interference from other devices.

– Unsatisfactory Sound Quality: Use high – quality, lossless music formats and play them on dedicated devices. Reset the equalizer to the neutral position and gradually adjust bass/treble.

Compatibility Limitations Solutions

– Not Compatible with IEMs: The K5 Pro can drive IEMs but is recommended for headphones with an impedance of 16 – 300 ohms. – Not Compatible with Linux: Linux has strong flexibility and diversity, and driver support for certain devices may be incomplete. It’s recommended to use the K5 Pro on the Windows system.- Not Compatible with GOXLR: The K5 Pro cannot be connected to GOXLR.

– Cannot Connect to Receiver: The receiver needs to support RCA input if you want to connect the K5 Pro to it to drive passive speakers.

Headphone + Speaker Play Together (no switch) : This is the normal architecture of K5-Pro: both outputs remain live. To mute speakers while using headphones, either turning the speaker’s own volume to zero, or unplug the RCA cable.

PS: The product offers RCA line-out and 3.5 mm headphone-out only; there are no XLR sockets.

Comparison

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Customer Reviews

4.1 out of 5 stars 1,448

4.4 out of 5 stars 3,203

4.4 out of 5 stars 426

4.4 out of 5 stars 310

4.5 out of 5 stars 652

4.7 out of 5 stars 120

4.4 out of 5 stars 466

Price

$79.99$79.99

$69.99$69.99

$79.99$79.99

$99.99$99.99

$29.99$29.99

$49.99$49.99

$79.99$79.99

Type

DAC+Headphone Amp

DAC+Headphone Amp

Headphone Amplifier/Preamp

DAC+Headphone Amplifier/Preamp

Headphone Amp

Headphone Amp

Headphone Amp +Preamp

MAX Power Output

–

–

2400mW@32Ω(High Gain)

3.5mm: 280mW,4.4mm: 1100mW@32Ω

40mW@100 Ohm

310mW@32Ω

–

Input

USB-C+OPT+COA+3.5mm Microphone

PC-USB+OPT+COA

3.5mm line in

USB + Optical

3.5mm AUX

3.5mm AUX

Bluetooth + RCA

Output

RCA + 3.5mm Headphone

RCA + 3.5mm Headphone

line out, 3.5/6.35mm headphone

3.5/4.4mm Headphone, AUX/OPT

3.5mm Headphone ×4

3.5mm Headphone ×5

RCA + 3.5mm Headphone + AUX

Treble & Bass Control

✔

✔

✔

✘

✘

✘

✔

THD

<0.003%

≤0.01%

<0.001%

<0.001%

–

<0.001%

≤ 0.02%

SNR

>110dB

≥105dB

≥108dB

≥120dB

–

≥105dB

≥103dB

Terminating Impedance

16-300 Ohm

16-200 Ohm

16-300 Ohm

16-300 Ohm

15-150 Ohm

16-300 Ohm

–

Power Adapter

–

–

–

–

12V/1A

–

12V/1.5A

Work Voltage

USB-C/DC5V

DC 5V

USB-C/DC5V

USB-C/DC5V

DC 12V

DC12V/1A

AC 110V – 240V

The upgraded version of Fosi Audio Q4 adds microphone function, K5 Pro headphone DAC amp combo, next-generation audio converter with unrivaled internals, more outstanding performance, and richer audio details. Born for Gaming. K5 Pro stereo DAC headphone amplifier is perfect for your home gaming system, equivalent to an external sound card, suitable for PS5/Computers/PC/MAC/active speakers, etc
K5 Pro USB DAC converts USB Type C/Optical/Coaxial signals to 3.5MM AUX and RCA signals with low distortion and great dynamic range. Unique design: 2-in-1 USB Type C interface charging port and audio input means K5 Pro is compatible with your phones(Note: Your audio source must be connected to the USB-A/C port.). RCA output can be connected to an amplifier or powered speakers on your desktop. 3.5 MM AUX and microphone interface can drive 16 Ohm to 300 Ohm headphones
K5 Pro headphone DAC adopts the Texas Instruments NE5532 op-amp chip. The circuit design implementing this DAC has been optimized for a low-noise floor and clean sound. K5 Pro has noticeably improved on overall sound quality, so you can get immersed in your music even more easily. Volume button and on button are combined into one, long press to switch on
Product Specifications: K5 Pro with master volume/bass/treble control and input mode switch. USB Type C rate: up to 24 bit/96 kHz, Optical/Coaxial sampling rate: up to 24 bit/192 kHz, THD ≤0.003%, SNR ≥110dB. Output power: 1000mw@16Ω, 500mw@32Ω, 300mw@64Ω, 150mw@128Ω, 80mw@300Ω
What You Get: K5 Pro DAC amp x1, 3.5MM headphone splitter x1, 2-in-1 USB Type A/C to Type C cable x1, User Manual x1, Optical Cable x1