Gaming & HiFi USB DAC Headphone Amplifier Combo

The Fosi Audio K5 Pro Gaming DAC Headphone Amplifier is a versatile all-in-one USB DAC and headphone amplifier built for gamers, music lovers, streamers, and desktop audio enthusiasts. Designed as an upgraded evolution of the popular Fosi Audio Q4, the K5 Pro delivers improved sound quality, stronger headphone amplification, microphone support, and richer audio detail for immersive gaming and HiFi listening experiences.

Supporting USB-C, optical, and coaxial digital inputs, the K5 Pro functions as an external sound card for PS5, PC, Mac, Nintendo Switch, laptops, active speakers, and headphones.

Whether you’re gaming competitively, streaming music, or building a desktop audio setup, the K5 Pro provides powerful and clean sound with low distortion and flexible connectivity.

Built for Gaming & Entertainment

The K5 Pro is specifically engineered for immersive gaming audio with enhanced positional detail, dynamic sound, and microphone compatibility.

Perfect for:

• PS5 gaming
• PC gaming
• Nintendo Switch audio
• Mac & laptop audio upgrades
• Streaming and multimedia
• Desktop entertainment setups

The DAC architecture improves:

• Directional audio accuracy
• Dialogue clarity
• Explosive gaming effects
• Environmental immersion
• Music playback quality

Its low-latency digital audio processing helps create a more engaging gaming experience.

Powerful Headphone Amplifier Performance

The K5 Pro includes a high-power headphone amplification stage capable of driving a wide range of gaming headsets and audiophile headphones.

Output Power:

• 1000mW @ 16Ω
• 500mW @ 32Ω
• 300mW @ 64Ω
• 150mW @ 128Ω
• 80mW @ 300Ω

Recommended Headphone Impedance:

• 16Ω–300Ω

This powerful output ensures:

• Better headphone control
• Strong dynamic impact
• Improved bass response
• Clearer detail retrieval
• Immersive sound presentation

Compatible with:

• Gaming headsets
• Studio headphones
• Audiophile headphones
• Sensitive IEMs

USB DAC with High-Resolution Audio Support

The K5 Pro supports high-quality digital audio decoding for both gaming and music playback.

Supported Sampling Rates:

USB-C Input:

• Up to 24bit / 96kHz

Optical & Coaxial Inputs:

• Up to 24bit / 192kHz

This provides:

• Cleaner digital audio conversion
• Improved detail clarity
• Lower distortion
• Better dynamic range
• Enhanced listening quality

Perfect for:

• HiFi music streaming
• Gaming audio
• Movies and media
• Desktop audio systems

Versatile Connectivity Options

The K5 Pro offers flexible connectivity for a wide range of devices and audio systems.

Inputs:

• USB Type-C
• Optical
• Coaxial
• 3.5mm Microphone Input

Outputs:

• 3.5mm Headphone Output
• RCA Output

The RCA output allows easy connection to:

• Powered speakers
• Stereo amplifiers
• Desktop speaker systems
• External audio setups

The built-in microphone input makes it ideal for:

• Gaming communication
• Voice chat
• Streaming
• Online meetings

Optimized Low-Noise Audio Circuit

The K5 Pro uses the Texas Instruments NE5532 op-amp with an upgraded low-noise audio circuit design.

Audio Performance:

• THD < 0.003%
• SNR ≥ 110dB
• Clean low-noise background
• Improved sound detail
• Enhanced dynamic response

Compared to the previous-generation Q4, the K5 Pro delivers:

• Better clarity
• Richer detail
• Improved soundstage
• More immersive listening

User-Friendly Desktop Design

The K5 Pro is compact, intuitive, and easy to operate for both beginners and experienced users.

Front Panel Controls:

• Master volume control
• Bass adjustment
• Treble adjustment
• Input mode switching

This allows fast customization for:

• Gaming
• Music genres
• Movies
• Personal listening preferences

Compact Desktop-Friendly Build

The K5 Pro combines portability and desktop functionality in a durable compact chassis.

Design Features:

• Compact footprint
• Lightweight construction
• Easy desktop placement
• USB Type-C power input
• Simple plug-and-play setup

Perfect for:

• Gaming desks
• Home office audio
• Minimal desktop setups
• Portable desktop audio systems

Technical Specifications

• Product Type: Gaming DAC Headphone Amplifier
• Output Power:
  • 1000mW @ 16Ω
  • 500mW @ 32Ω
  • 300mW @ 64Ω
  • 150mW @ 128Ω
  • 80mW @ 300Ω
• Headphone Impedance: 16Ω–300Ω
• Inputs:
  • USB Type-C
  • Optical
  • Coaxial
  • 3.5mm Microphone
• Outputs:
  • 3.5mm Headphone
  • RCA Output
• USB Sampling Rate:
  • 16bit/44.1kHz to 24bit/96kHz
• Optical/Coaxial Sampling Rate:
  • 16bit/44.1kHz to 24bit/192kHz
• THD: <0.003%
• SNR: ≥110dB
• Power Input: USB Type-C
• Power Supply: 5V
• Dimensions: 112 × 95 × 30mm
• Weight: 251g

What’s Included

• K5 Pro DAC Headphone Amplifier ×1
• 3.5mm Headphone Splitter ×1
• USB-A/C to USB-C Cable ×1
• Optical Cable ×1
• User Manual ×1
• 24-Month Warranty Support

Key Features

• USB DAC and headphone amp combo
• Designed for gaming and HiFi audio
• Compatible with PS5, PC, Mac & Switch
• Powerful 1000mW headphone output
• USB-C, optical & coaxial inputs
• 3.5mm microphone support
• RCA output for speakers and amplifiers
• NE5532 low-noise audio circuit
• Bass and treble controls
• Compact desktop audio solution