Fosi Audio ZA3 Balanced Stereo Amplifier 48Volt/5 Amp power supply.

At Fosi Audio, behind every innovation, there’s a story. The birth of the ZA3 amplifier is just such a story, centered around our users. After the launch of the V3 amplifier, we gathered innumerable feedback from passionate audiophiles. They expressed a desire for us to develop an even better amplifier based on V3.

• Input: RCA, XLR, ¼”TRS; Output: Stereo, Mono
• SNR≥106dB; THD<0.006%; SINAD: 89dB; Frequency Response: 20Hz-20kHz (±0.1dB)
• Rated Power Output: Stereo 180W*2 @4Ω; Mono 235W
• Description
  • 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.
  • What you Get: ZA3 Power Amplifier x1, Power Adapter x1 (The plug of the power adapter will match the country of your delivery address), User Manual x1, our worry-free 24-month warranty, and friendly customer service.
  • Chip Set: Texas Instruments TPA3255
  • Output Power:
    With 48V/5A PSU Stereo; 155Wx2 @4Ω; Mono: 235Wx1 @4
  • Terminating Impedance: 2-8Ω
  • Input 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:  48V/5A
  • What‘s in the box？
    • ZA3 Power Amplifier x 1
    • 32V/5A or 48V/5A Power Adapter x 1
    • User’s Manual x 1
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