All-in-One Desktop HiFi DAC, Headphone Amplifier & Preamp

The Fosi Audio ZH3 DAC Headphone Amp is a premium all-in-one desktop HiFi solution designed for audiophiles, gamers, music producers, and headphone enthusiasts seeking reference-grade sound quality, powerful balanced amplification, and flexible connectivity.

Combining a flagship AKM AK4493SEQ DAC chipset, XMOS XU316 USB processor, fully balanced circuitry, and high-power headphone amplification, the ZH3 delivers ultra-clean, high-resolution audio with exceptional detail, dynamics, and customization options for both headphones and active speaker systems.

Perfect as a desktop DAC, headphone amplifier, and preamplifier, the ZH3 is engineered to serve as the central hub for modern HiFi audio setups.

Premium AKM DAC Architecture for Reference Sound

At the core of the ZH3 is the highly regarded AKM AK4493SEQ DAC chipset paired with the XMOS XU316 USB processor for advanced high-resolution decoding performance.

Hi-Res Audio Support:

• PCM up to 768kHz / 32bit
• Native DSD512 playback
• XMOS XU316 USB interface
• Ultra-low noise architecture
• Audiophile-grade digital decoding

This premium audio platform produces:

• Exceptional detail retrieval
• Natural tonal balance
• Deep controlled bass
• Smooth treble extension
• Expansive soundstage imaging

Ideal for:

• Hi-Res music streaming
• Lossless audio playback
• Studio-quality listening
• Audiophile desktop setups
• High-end headphone listening

Fully Balanced Headphone Amplifier Design

The ZH3 uses a self-developed fully balanced amplifier circuit with multiple ultra-low-noise LDOs and premium capacitors to ensure clean and powerful signal amplification.

Amplification Features:

• Fully balanced internal architecture
• Four premium OPA1612 op-amps
• Extremely low noise floor: 1.9μV
• Low distortion performance
• High dynamic range output

This results in:

• Cleaner background audio
• Improved detail clarity
• Better channel separation
• More accurate imaging
• Enhanced headphone control

Powerful Output for Headphones & IEMs

The ZH3 is designed to drive a wide range of headphones from sensitive IEMs to demanding over-ear audiophile headphones.

Headphone Outputs:

6.35mm Single-Ended Output

• 640mW @ 32Ω ×2

4.4mm Balanced Output

• 2570mW @ 32Ω ×2

Supported Headphone Impedance:

• 16Ω–300Ω

The 3-level gain switch allows precise matching for different headphone sensitivities and impedance levels.

Perfect for:

• Planar magnetic headphones
• High-impedance headphones
• Audiophile IEMs
• Studio monitoring headphones

Versatile Desktop Connectivity

The ZH3 provides extensive input and output options for seamless integration into modern desktop audio systems.

Inputs:

• USB
• Optical
• Coaxial
• RCA Analog Input

Outputs:

• 4.4mm Balanced Headphone
• 6.35mm Headphone
• RCA Pre-Out
• Balanced XLR Output

This flexibility allows the ZH3 to function as:

• DAC
• Headphone amplifier
• Desktop preamp
• Active speaker controller
• Gaming DAC solution

Gaming & Console Compatibility

The ZH3 includes UAC mode switching for improved compatibility with gaming consoles and multimedia systems.

Ideal for:

• PC gaming audio
• Console gaming
• Immersive entertainment
• Spatial audio playback
• Competitive gaming setups

Its low-latency USB implementation and powerful amplification enhance gaming immersion and audio precision.

Advanced Sound Customization

The ZH3 offers extensive tuning flexibility for users who prefer personalized sound signatures.

Customization Features:

• Bass EQ adjustment
• Treble EQ adjustment
• 6 selectable digital filters
• Bypass mode
• Swappable op-amps

This allows users to fine-tune:

• Warmth
• Clarity
• Bass response
• Treble energy
• Overall tonal balance

Perfect for matching different headphones, genres, and listening preferences.

Premium Minimalist Desktop Design

Following the modern Fosi Audio Z-Series design language, the ZH3 combines premium materials with a clean desktop aesthetic.

Design Highlights:

• Integrated front display
• Elegant minimalist interface
• Compact desktop footprint
• Premium build quality
• Modern HiFi styling

The screen-based control system keeps the front panel clean while providing easy access to advanced features and settings.

Technical Specifications

• Product Type: DAC / Headphone Amplifier / Preamp
• DAC Chipset: AKM AK4493SEQ
• USB Processor: XMOS XU316
• Op-Amps: 4 × OPA1612
• PCM Support: Up to 768kHz / 32bit
• DSD Support: Native DSD512
• Noise Floor: 1.9μV
• Headphone Outputs:
  • 6.35mm Single-Ended
  • 4.4mm Balanced
• Output Power:
  • 640mW @ 32Ω (SE)
  • 2570mW @ 32Ω (Balanced)
• Supported Headphone Impedance: 16Ω–300Ω
• Inputs:
  • USB
  • Optical
  • Coaxial
  • RCA
• Outputs:
  • RCA
  • XLR
  • 4.4mm
  • 6.35mm
• Features:
  • 3-level gain switch
  • Bass/Treble EQ
  • 6 digital filters
  • Swappable op-amps
  • UAC mode switching

Features

• AKM AK4493SEQ flagship DAC
• XMOS XU316 USB processor
• Fully balanced headphone amplifier
• 4.4mm balanced & 6.35mm outputs
• XLR and RCA preamp outputs
• PCM 768kHz / DSD512 support
• Powerful 2570mW balanced output
• Ultra-low 1.9μV noise floor
• Bass & treble EQ controls
• Gaming and desktop HiFi compatibility