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
Tax included.
Shipping calculated at checkout.
- PBTL Mono Mode Support
- XLR Input / 12V Trigger in
- Op-Amp Rolling: SS3602, MUSES02, OPA2134PA
- Replaceable Knobs: Black Knob
- Buy with ZD3 - Save 15%!
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
B
I bought the ZA3 mainly given its functionality and small footprint. The ZA3 was exactly what I needed for the sound system in my home office, analog inputs, 2 channel stereo and subwoofer analog output, and I purchased it with the basic 32V; 5A PSU. Currently it’s paired up with 25 year old NHT Super One speakers (86 dB efficiency), and is fed by the stereo single ended outputs from the Visio TV, which in turn is fed by an Apple TV unit. The only thing I needed help with was turning the unit on, which I referred the manual. I ran a bit of a stress test for an hr, both channels playing rock at loudness levels far above normal listened levels, to validate the thermal design. In a closed cabinet, the bottom of the case was maybe 5 degrees above ambient, and the top less so. The Fosi Audio engineers did a great job at a fanless design, and IMHO did a wonderful job on the implementation. In about a year, as I expand the system, I’ll be looking for a preamp with XLR outputs. Summary: Excellent value, great performance, and clever product design - the Fosi ZA3 is a winner.
D
Amazing sound quality, and a lot of power in a small footprint! Be sure to get the 48 V power supply If you want to squeeze every little bit of performance out of this Amazing Little Amp. I only wish they had something like this when I was growing up in the 80s and 90s. We would look through JC Whitney catalogs and order these little Pyle amplifiers because that’s all we could afford. And they had like 10% harmonic distortion and sounded absolutely terrible compared to the ZA3. I would love to see some active cooling when they come out with their new models because the ZA3 and the mono blocks do run warm. Especially after long listening sessions Cranked up to 11. I would not even mind if the cases were slightly bigger to accommodate small cooling fans. I also believe this would add to the longevity of the components of the Amplifier and possibly produce more power.. And you could still keep the Z product line but maybe come out with A slightly more expensive R series ? “ reference” lol. . And make sure that all of the case sizes are the same so you could make a real nice looking stack. Also leave more room for op amps so you can easily fit the massive sparkos op amps in the cases. I bet a lot of people would be totally all over that!. Keep up the good work. I’m so happy that everybody can afford High quality audio equipment without breaking the bank!
S
I am impressed the performance of FOSI ZA3 amplifier with 48v PSU in stereo mode. The ZD3 paired with ZA3 provided fuller and noise free sound quality. I am sure if ZD3 paired with two ZA3 in mono mode would be even better. I only wish the system could also equipped with the line-out and headphone jacks.
C
This little amp has decent power for my B&W bookshelf speakers. Plenty of volume for my 200 sqft. room. Detailed mids and highs. Very good bass extension. No complaints especially for a small budget.
K
Very good sounding, specialy with Burson Audio v7 Vivid omp amp.
