Fosi Audio ZA3 Balanced Stereo Amplifier Home Audio 2CH Mono Amp with TPA3255 Chip
- Regular price
- $109.99 USD
- Sale price
- $109.99 USD
- Regular price
-
$109.99 USD
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- PBTL Mono Mode Support
- XLR Input / 12V Trigger in
- Op-Amp Rolling: SS3602, MUSES02, OPA2134PA
- Replaceable Knobs: Black Knob
- Valentine's Day Exclusive Bundles - Save to 20%
Amplifying Your Voice, Shaping Our Innovation
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 @4Ω
12V Trigger Sync Interface
Smooth synchronization with other devices for easy one-click power management, unifying your audio system's operation. (Please use a 3.5mm stereo trigger cable for the trigger input on the ZA3, it must be noted that it takes several seconds for the trigger to activate the ZA3.)
Aluminum Alloy and One-Piece Molded Chassis
Delicate sandblasting and smooth beveled edges, exuding a premium, exquisite texture and high-end appeal.
Logarithmic Potentiometer
Helps to achieve a fine volume tuning to match human ear's auditory characteristics.
- Dual-Mode Innovation: This new generation mini amplifier offers both stereo and mono modes, adapts flexibly to your diverse needs, allowing seamless mode switching. In stereo mode, it delivers a robust output of up to 180W, 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, OPA2604, OPA2134PA, OP249, AD827, RM4558, LM4562, LME49720HA, etc. to fine-tune your sound to perfection.
- 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: 2-8Ω
- 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: 32V/5A, 48V/5A
- Stereo Mode : Replacing the op amps for both left and right channels in stereo mode, regardless of RCA or XLR inputs, will notably enhance sound quality.
Mono Mode: Only replacing the op amps for the right channel. - XLR Input: Using XLR input mode allows for further sound quality enhancement by replacing the op amps for the XLR channel.
- Subwoofer Channel: If a subwoofer is connected, there's the option to replace the op amps responsible for the subwoofer channel.
Note: Carefully align the notch/the number '1' on the chip's cover with the 'O1' mark on the PCB.
- Here is a tutorial video for your reference: https://youtu.be/VvYYwxAfBi4
I
I originally got the Fosi ZA3 for stereo use and was impressed with the clean, detailed sound. However, after getting a second unit to run them as monoblocks, the experience improved significantly. The mono configuration delivers a fuller-bodied sound, especially in the bass region, and the soundstage is noticeably wider.
One of the best aspects of the ZA3 is the ability to swap op-amps. After some experimentation, I found that using the OPA1612A at the XLR input and the Oracle II 02 at the right channel, while removing the unused ones, provides the best sound in my system—detailed, controlled, and engaging.
Overall, the ZA3 is a fun and well-built amplifier with great customization potential. Highly recommended for those who enjoy tweaking their sound!
J
Too bad, no tone control.
C
JUST DO IT. 2 though
F
My musical listening has opened to pure enjoyment with the ZA3 in mono with V7V chips
M
I am not an expert or anything, but this little box drove a pair of Dali Oberon 5 of my home cinema setup, with great results! I would recommend it to anyone wanting a compact alternative to (a lot) more expensive amps, or a first amp to an new, low cost setup.