Name: Fosi Audio ZA3 Balanced Stereo Amplifier TPA3255 Dual Mode
Brand: Fosi Audio
SKU: B0CLP4T5L7
Price: 149.99 USD
Availability: InStock
Rating: 4.6 (1200 reviews)

Overview

Fosi Audio ZA3 — balanced dual-mode Class-D amp with TPA3255, XLR/RCA inputs, stereo or mono operation, and sub out for desktop and home theater.

At a Glance

Dual-Mode Innovation
Richer Connectivity
Audiophile-Grade Components
Advanced Heat Dissipation

Key Features

Dual-Mode Innovation: This new generation mini amplifier offers both stereo and mono modes, and adapts flexibly to your diverse needs, allowing seamless mode switching. In stereo mode, it delivers a robust output of up to 155W, while in mono mode, the power soars to a maximum of 235W. Pair two ZA3 units in mono configuration to create a powerful audio system, significantly enhancing your listening experience.
Richer Connectivity: Debut amplifier with balanced input and trigger in, the ZA3 features a balanced combo audio signal input connector supporting both XLR and 1/4" TRS plugs. This design minimizes interference and reduces noise floor. The 12V trigger-in connector enables synchronization with other devices, streamlining the process of turning on/off without individual operations.
Audiophile-Grade Components: The ZA3 features the TPA3255 high-end Class-D amp chip and utilizes premium Japanese NCC, ELNA, and German WIMA capacitors, and Japanese Sumida inductors for exceptional audio quality. With a SINAD rating of up to 89dB, an SNR of up to 106dB, and a low noise floor of only 150μV, it delivers exceptional clarity and low distortion.
Advanced Heat Dissipation: Based on V3's groundbreaking heat dissipation design, we upgraded ZA3's cooling system by featuring a larger chassis, moving vents to the sides, and adding dust covers to achieve better ventilation for a sustained and stable high power output.
Enhanced Scalable Fun: Personalize your audio experience with the op-amp rolling feature! The ZA3 stocks five swappable op-amps for left and right channel outputs, balanced input, and subwoofer output. Experiment with compatible DIP8 dual op-amps such as Sparkos SS3602, MUSES02, OPA2134PA , OP249, AD827, RM4558, LM4562, LME49720HA, etc. to fine-tune your sound to perfection.

Who It's For

Passive bookshelf and tower speakers in desktop, apartment, and living-room systems where compact Class-D power and clean connectivity matter more than a rack-sized receiver.

Why Choose the ZA3

The ZA3 is part of the Fosi Audio lineup of compact HiFi amplifiers, DACs, and desktop audio components. It focuses on practical connectivity, measurable performance, and value — the same product family featured on the official Fosi Audio store and Amazon. Use this page to review specs and photos, then buy through Amazon when you are ready.

Why Fosi Audio

Fosi Audio builds compact HiFi amplifiers, DACs, and desktop audio gear that punch above their price. From TPA3255 power amps to balanced DAC preamps and gaming DAC/AMPs, the lineup focuses on clean sound, useful connectivity, and value — the same products featured on Amazon.