Fosi Audio ZA3 Class D 2.0 Power Amplifier

Fosi Audio ZA3 Class D 2.0 Power Amplifier

The Fosi Audio ZA3 Class D 2.0 Power Amplifier is a high-performance compact power amplifier designed for audiophiles who demand clean, powerful, and precise sound reproduction. Built around the advanced Texas Instruments TPA3255 Class D amplifier chip, the ZA3 delivers exceptional efficiency, ultra-low distortion, and flexible output modes suitable for stereo home audio systems, desktop Hi-Fi setups, and even professional audio environments.

With support for RCA, XLR, and ¼” TRS inputs, plus stereo and mono output modes, the ZA3 is engineered to adapt to multiple audio configurations while maintaining pure sound quality and strong power delivery.

Advanced TPA3255 Class D Amplifier Architecture

At the core of the Fosi Audio ZA3 lies the highly respected Texas Instruments TPA3255 amplifier chip, known for its high efficiency and audiophile-grade performance.

Key Technology Features

• PurePath Ultra-HD architecture

• High-efficiency Class D operation

• Advanced feedback control system

• Ultra-low distortion audio processing

• High-speed switching design

Audio Benefits

• Clean and detailed sound reproduction

• Powerful dynamic response

• Accurate instrument separation

• Minimal distortion across full frequency range

• Stable high-power performance

This ensures premium Hi-Fi sound quality even under demanding conditions.

High Power Output with Stereo and Mono Modes

The ZA3 is designed for flexible high-power output, supporting both stereo and mono configurations.

Power Output Specifications

With 48V / 5A PSU:

• Stereo: 180W × 2 @ 4Ω

• Mono: 235W × 1 @ 4Ω

With 32V / 5A PSU:

• Stereo: 95W × 2 @ 4Ω

• Mono: 110W × 1 @ 4Ω

Benefits

• Powerful stereo sound for home audio

• High-power mono mode for subwoofer or single-channel use

• Flexible system configuration

• Stable performance under load

• Strong bass and dynamic output

This makes it suitable for both home and semi-professional audio systems.

High Signal Quality with Ultra-Low Distortion

The Fosi Audio ZA3 is designed to deliver extremely clean audio output with minimal distortion.

Audio Performance Metrics

• THD: <0.006%

• SINAD: 89dB

• SNR: ≥106dB

• Dynamic Range: ≥106dB

Benefits

• Crystal-clear sound reproduction

• Minimal background noise

• High-resolution audio detail

• Natural and balanced sound output

• Professional-grade clarity

This ensures a pure and immersive listening experience.

Wide Frequency Response for Full-Range Sound

The ZA3 supports a wide and accurate frequency range for natural sound reproduction.

Frequency Specification

• 20Hz – 20kHz (±0.1dB)

Benefits

• Deep and controlled bass

• Clear vocal reproduction

• Smooth treble performance

• Balanced sound signature

• Accurate musical detail

This ensures full-spectrum Hi-Fi performance.

Multi-Input Connectivity for Maximum Flexibility

The ZA3 supports multiple input options for compatibility with various audio devices.

Input Options

• RCA analog input

• XLR balanced input

• ¼” TRS input

Benefits

• Professional and home audio compatibility

• Flexible connection options

• Reduced noise with balanced input

• Easy system integration

This makes it suitable for both casual users and audio professionals.

Versatile Output System

The amplifier includes multiple output options for speaker and subwoofer setups.

Output Features

• Stereo speaker output

• Mono output mode

• Active subwoofer output

• Banana plug or bare wire support

Benefits

• Flexible speaker configuration

• Easy system expansion

• Strong subwoofer integration

• Secure and stable connections

This ensures complete system adaptability.

Speaker Compatibility Range

The ZA3 is compatible with a wide range of speaker impedance levels.

Compatibility

• 2Ω to 8Ω speakers

Benefits

• Works with most passive speakers

• Suitable for bookshelf and floor-standing speakers

• Flexible setup options

• Stable performance across loads

This ensures universal usability.

Compact Yet Professional Build Design

The ZA3 is designed with a compact structure while maintaining professional build quality.

Design Features

• Durable metal chassis

• Compact desktop-friendly size

• Efficient heat dissipation design

Benefits

• Space-saving installation

• Long-lasting durability

• Professional appearance

• Stable thermal performance

This makes it suitable for home and studio environments.

High Efficiency Class D Performance

The amplifier uses advanced Class D technology for maximum efficiency and low heat generation.

Efficiency Features

• High power efficiency design

• Reduced energy loss

• Low heat output

Benefits

• Energy-efficient operation

• Stable long-term usage

• Reliable performance under load

• Quiet operation

This ensures modern amplifier efficiency standards.

Clean Power Delivery for Audiophile Sound

The ZA3 is designed for accurate and clean power delivery to speakers.

Audio Benefits

• Precise signal amplification

• Strong transient response

• Controlled bass performance

• Natural sound reproduction

This ensures a high-quality listening experience.

Ideal Applications of Fosi Audio ZA3

The ZA3 is suitable for a wide range of audio applications.

Home Audio Systems

Perfect for Hi-Fi music listening setups.

Desktop Audio Setup

Ideal for PC-based audio systems.

Home Theater Systems

Enhances movie and TV audio performance.

Professional Audio Use

Suitable for studio and monitoring applications.

Why Choose Fosi Audio ZA3

The ZA3 stands out due to its combination of power, clarity, and flexible connectivity.

Key Features Summary

• TPA3255 high-performance amplifier chip

• Stereo and mono output modes

• RCA, XLR, and TRS inputs

• Ultra-low distortion (<0.006%)

• SNR ≥106dB for clean sound

• Wide frequency response (20Hz–20kHz)

• Active subwoofer output support

• Compact professional design

• High-efficiency Class D operation

• Flexible speaker compatibility (2–8Ω)

This makes it a premium choice for modern audio systems.

Audio Phonic Quality Assurance

Audio Phonic ensures every audio product meets strict performance and reliability standards. The Fosi Audio ZA3 reflects this commitment by delivering powerful amplification, ultra-clean sound, and professional-level flexibility in a compact design.

Technical Specifications of Fosi Audio ZA3

General Information

• Brand: Fosi Audio (Audio Phonic distribution context)

• Product Name: Fosi Audio ZA3 Class D 2.0 Power Amplifier

• Category: Power Amplifier

• Channel: 2.0 Stereo / Mono Mode

Power Output

• 180W × 2 @ 4Ω (48V PSU)

• 235W × 1 Mono @ 4Ω (48V PSU)

• 95W × 2 @ 4Ω (32V PSU)

Audio Performance

• THD: <0.006%

• SNR: ≥106dB

• SINAD: 89dB

• Dynamic Range: ≥106dB

• Frequency Response: 20Hz – 20kHz (±0.1dB)

Connectivity

• RCA input

• XLR balanced input

• ¼” TRS input

• Speaker output

• Active subwoofer output

Power Input

• DC 24V – 48V

Speaker Compatibility

• 2Ω – 8Ω impedance support

Frequently Asked Questions (FAQs)

What is Fosi Audio ZA3 used for?

It is used as a high-power stereo or mono amplifier for home and professional audio systems.

Does it support mono mode?

Yes, it supports PBTL mono mode for high-power single-channel output.

What is its maximum power output?

Up to 180W × 2 in stereo and 235W in mono (with 48V PSU).

Does it support balanced input?

Yes, it supports XLR and TRS balanced inputs.

Is it suitable for subwoofers?

Yes, it includes active subwoofer output support.

What speakers can it drive?

It supports 2Ω to 8Ω passive speakers.

Is it good for home theater use?

Yes, it delivers powerful and clear audio for movie systems.

What makes its sound quality special?

It uses TPA3255 with ultra-low distortion and high dynamic range for Hi-Fi sound.