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Fosi Audio ZA3 Balanced Stereo Amplifier 235W with 48V Power Supply

Fosi AudioPart # 235-264
Model: ZA3

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The Fosi Audio ZA3 is a compact Class D amplifier designed for high-fidelity stereo or monoblock configurations. It offers robust power output and versatile connectivity, making it suitable for various home audio setups.

Key Features

  • Subwoofer output to be sure listeners can feel the music
  • Advanced design and side ventilation offers unprecedented heat dissipation
  • Aluminum alloy molded chassis offer a both durable and exquisite design
  • A logarithmic potentiometer makes it easier to fine tune volume for the human ear
  • A thoughtful combination of Japanese and German components delivers only the highest quality functionality
  • 12V Trigger Sync Interface offers an easy power management to work with the rest of your audio system
  • 48V 5A power supply included
Your Price: $142.49
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MSRP: $149.99
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Overview

Fosi Audio ZA3 Balanced Stereo Amplifier 235W with 48V Power Supply

Fosi Audio ZA3

The next generation balanced dual-mode Class-D power amplifier, Fosi Audio's first amplifier supporting both stereo and mono modes.

Amplifying Your Voice, Shaping Our Innovation

At Fosi Audio, every innovation has a story, and the creation of the ZA3 amplifier is one rooted in our users' voices. After releasing the V3 amplifier, we received extensive feedback from dedicated audiophiles. Many urged us to develop an even more advanced amplifier building on the foundation of the V3.

TI TPA3255 Amp Chip Integrated

Delivers exceptional sound quality and ultra-low distortion throughout the audio range while maintaining Class-D efficiency.

Advanced Heat Dissipation Design

Improved thermal performance through a larger chassis, full-body heatsink, and side ventilation protected by dust covers.

Swappable Op-Amps

Compatible with DIP8 dual op-amps, allowing you to swap and tailor the sound signature to your personal preference.

Separated Digital & Analog Modules

An optimized circuit board layout shields critical audio components from interference, resulting in cleaner, more accurate sound.

12V Trigger Sync Interface

Seamless integration with other devices allows for convenient one-click power control, streamlining your audio system's operation. (Use a 3.5mm stereo trigger cable for the ZA3's trigger input—please note it takes a few seconds for the trigger to activate the ZA3.)

Aluminum Alloy and One-Piece Molded Chassis

Features fine sandblasting and gently beveled edges, offering a refined texture and a sophisticated, high-end aesthetic.

Logarithmic Potentiometer

Enables precise volume adjustment tailored to the auditory sensitivity of the human ear.

Dual-Mode Innovation 
The ZA3 mini amplifier supports both stereo and mono modes, offering flexibility for a wide range of audio setups with effortless switching. It delivers up to 180W in stereo and up to 235W in mono; pair two ZA3 units in mono for a powerful, immersive listening experience. 

Richer Connectivity
As Fosi Audio’s first amplifier with balanced input and trigger-in, the ZA3 features a combo connector supporting XLR and 1/4" TRS plugs, minimizing interference and lowering the noise floor. The 12V trigger-in allows synchronized power control with other devices for streamlined operation. 

Audiophile-Grade Components
Equipped with the TPA3255 Class-D amp chip, the ZA3 incorporates high-quality components including Japanese NCC, ELNA, German WIMA capacitors, and Japanese Sumida inductors. It delivers detailed sound with up to 89dB SINAD, 106dB SNR, and an ultra-low 150μV noise floor. 

Advanced Heat Dissipation 
Building on the V3’s heat management design, the ZA3 features an enlarged chassis, side ventilation with dust covers, and improved airflow to support stable high-power performance over extended sessions. 

Enhanced Scalable Fun
The ZA3 offers op-amp rolling with five swappable DIP8 slots for customizing the sound signature across left/right channels, balanced input, and subwoofer output. Compatible with op-amps like Sparkos SS3602, MUSES02, OPA2604, OP249, AD827, and others, it lets you fine-tune your system to your exact preferences.

Specifications

  • Chip Set: Texas Instruments TPA3255 
  • Output Power:
    With 48V/5A PSU Stereo; 155Wx2 @4Ω; Mono: 235Wx1 @4Ω
    With 32V/5A PSU Stereo; 95Wx2 @4Ω; Mono: 110Wx1 @4Ω 
  • Terminating Impedance: 2-8ΩInput Mode: RCA, XLR, 1/4" TRS 
  • Output Mode: Speaker Output (supports banana plug or bare wire connection), Active Subwoofer Output 
  • Frequency Range: 20Hz - 20KHz(±0.1dB)

  • SINAD: 89dB 
  • THD: ＜0.006% 
  • SNR: ≥106dB 
  • Dynamic Range: ≥106dB 
  • Device Dimension: 15.49 x 18.39 x 5.08 cm; 1.78 Kilograms 
  • DC Input Range: 24-48V 
  • Power Supply: 32V/5A, 48V/5A

Product Details

BrandFosi Audio
ModelZA3
Part Number235-264
Unit of MeasureEach
Weight3.97

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