Fosi Audio ZA3 48V ZA3 Balanced Stereo Amplifier

The Fosi Audio ZA3 is a next-generation compact power amplifier developed in response to user feedback, offering enhanced performance, flexibility, and connectivity. Designed for audiophiles, it builds upon the success of the V3 with improved power output, refined components, and expanded functionality.

Featuring a dual-mode design, the ZA3 supports both stereo and mono operation. In stereo mode, it delivers powerful dual-channel output, while mono mode enables even higher output for demanding setups. Pairing two units in mono allows for a more powerful and immersive audio system.

The amplifier includes versatile input options such as RCA, XLR, and 1/4" TRS, along with a 12V trigger input for seamless system integration. Its balanced input design minimizes noise and interference, ensuring clean signal transmission across different setups.

Internally, the ZA3 uses the Texas Instruments TPA3255 Class-D amplifier chip combined with high-quality components from NCC, ELNA, WIMA, and Sumida. This results in low distortion, high signal clarity, and a dynamic, detailed sound signature.

The upgraded chassis design improves heat dissipation for stable high-power performance. Additionally, the swappable op-amp design allows users to fine-tune the sound signature to match their preferences, adding flexibility for advanced users.

Features
Dual Mode Stereo And Mono Operation
Texas Instruments TPA3255 Amplifier Chip
RCA XLR And 1/4" TRS Inputs
Balanced Combo Input Design
12V Trigger Input
High Power Output Up To 235W Mono
Low Distortion And High Dynamic Range
Advanced Heat Dissipation Design
Swappable Op-Amps For Sound Customization

Compatibility
Speakers 2Ω To 8Ω
Active Subwoofers
Audio Sources With RCA XLR Or TRS Output
Speaker Terminals Banana Plugs Or Bare Wire

Specifications
Chip Set: Texas Instruments TPA3255
Terminating Impedance: 2-8Ω
Input Mode: RCA XLR 1/4" TRS
Output Mode: Speaker Output And Active Subwoofer Output
Frequency Range: 20Hz - 20KHz (±0.1dB)
SINAD: 89dB
THD: 0.006%
SNR: ≥106dB
Dynamic Range: ≥106dB
DC Input Range: 24-48V
Power Supply: 32V/5A 48V/5A

Dimensions & Weight
Dimensions: 15.49 × 18.39 × 5.08 cm
Weight: 1.78 kg

In The Box
ZA3 Power Amplifier
32V/5A Or 48V/5A Power Adapter
User’s Manual