Fosi Audio ZA3 Balanced Stereo/Mono Amplifier HiFi with TPA3255 Chips, Mini Audio Amp Monoblock with XLR RCA Inputs and 12V Trigger-in for Desktop Bookshelf Passive Speakers with 48V5A Power SupplyClimatePartner certified
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Fosi Audio ZA3 Balanced Stereo/Mono Amplifier HiFi with TPA3255 Chips, Mini Audio Amp Monoblock with XLR RCA Inputs and 12V Trigger-in for Desktop Bookshelf Passive Speakers with 48V5A Power SupplyClimatePartner certified

Product ID: 593574160
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Details

  • Item dimensions L x W x H
    15.5 x 18.4 x
  • Voltage
    48 Volts
  • Manufacturer
    Fosi Audio
  • Maximum supply voltage
    48 Volts (DC)
  • Minimum supply voltage
    230 Volts
🔊235W max power (Mono mode)
🔗Balanced XLR/TRS combo input
❄️Advanced heat dissipation system

Description

🎧 Elevate your desktop sound game with power, precision, and pro-level polish.

  • CUSTOM SOUND LAB - Swap op-amps to personalize your audio signature and stand out in any audiophile circle.
  • COOL UNDER PRESSURE - Enhanced ventilation and dust covers keep your amp running stable during marathon listening sessions.
  • DUAL MODE POWERHOUSE - Switch effortlessly between 180W stereo and 235W mono for tailored sound dominance.
  • PRO GRADE CONNECTIVITY - Balanced XLR/TRS inputs plus 12V trigger-in for seamless integration and noise-free audio.
  • AUDIOPHILE APPROVED COMPONENTS - TPA3255 chip with premium Japanese and German parts ensures crystal-clear, low-distortion sound.

The Fosi Audio ZA3 is a compact, high-performance stereo/mono amplifier featuring the advanced TPA3255 Class-D chip, delivering up to 235W in mono mode. It offers balanced XLR/TRS inputs and a 12V trigger for professional connectivity, premium audiophile-grade components for superior sound clarity, and an upgraded cooling system for sustained power output. Its unique op-amp rolling feature allows customizable sound tuning, making it ideal for desktop or bookshelf passive speaker setups.

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Specifications

ManufacturerFosi Audio
Part numberZA3
Item Weight1.75 kg
Product Dimensions15.49 x 18.39 x 5.08 cm; 1.75 kg
Item model numberZA3
ColourBlack
MaterialAluminium
Voltage48 Volts
Wattage235 watts
Item Package Quantity1
Plug profileSurface Mount
Specification metFCC
Batteries included?No
Batteries Required?No

Have a Question? See What Others Asked

Is it possible to use the trigger out from the Fosi Audio ZD3 to two pieces of ZA3 amplifiers?
How to set up a system using two ZA3 units in mono mode?
ZA3 recommendations for replacing op-amps in mono mode?
No front light on ZA3 though there is light on the ac adapter.
The power on LED light on my ZA3 is dead.

Reviews

R**L

Great little amp

I bought this amp after reading reviews online so I shouldn’t have been surprised by how good it is but I was. Firstly the size, it is small, I wanted something for music in the bedroom and this is small and discreet which it is. My second surprise was the power it delivers from such a small size. I’m driving two mission towers and a kef sub and this sounds awesome. It’s not a fancy do everything amp but if you want good power without breaking the bank I’m not sure why you would look any further. I’m very happy with it.

M**T

A Great Amplifier that can extend your Hi-Fi hobby

After much thought, I purchased two of these Amps to work in conjunction with the Fosi DAC ZD3 that I had previously purchased. I have both Amps set up in Mono to the DAC. The DAC does the channel separation. I have not lived with the system for very long, but initial impressions are that these are incredibly good amplifiers that really punch out good clear sound. They are also now possibly exposing the weakness of my speakers, but that could also be just another head rouse to purchase a different set of speakers.I like the fact that I can later play around with Op Amps, and that will take my Hi-Fi hobby into another dimension.I did have a little trouble setting up the triggers to both Amps, but that was easily overcome by purchasing a 3.5mm male jack headphone splitter that goes into two 3.5mm female ends. I have then added two short 3.5mm male to male cables to go from the DAC (now doubled) trigger to the amps. It works perfectly and the trigger does not seem to mind a double (stereo) 3.5mm lead for it to work.CEC works brilliantly on the DAC, so I can now turn on the whole set up from my smart television. The television is hooked up to the DAC via eArc HDMI, so a digital signal is received at the Fosi DAC, which is in turn doing all the heavy lifting to convert sound to an analogue signal, which it passes to the Amps. The Amps are turned on by the 12v triggers rather than the CEC signal.

C**R

Audiophile Quality

Seriously good. This little powerhouse isn't just clean sounding, accurate and a true audiophile performer, it is also exceptionally good value if you don't care about brand image and loads of knobs. It is demonstrably better than any other amp I have used that have including 'high end' kit from Quad, Musical Fidelity, Marantz, Cambridge Audio and Sugden to name a few. I'm using 6 ohm speakers and this beauty just sounds exquisitely poised. Depending on the source the mid range is so rich and imaging holographic. I'm now thinking I need to change my (expensive) desktop amp which sounds decidedly 'meh' by comparison, and get another ZA3. The psu and the amp itself gets barely warm in use I am very hopeful that thanks to clever design and high quality components that it will last a very long time. Congratulations to the Fosi team.

J**N

Edit: Excellent, and not just for the money

Second edit: Fosi Audio saw my message below and has contacted me to offer a free replacement without me having to ship the other one back. Really good customer service.Warning: Everything I wrote below is true, but now I'm having scratchy noises while adjusting volume, just like an elderly amp with an analogue pot. Not sure how to get it fixed without shipping to China. Extremely disappointed.I got one of the first batch of these, so I've had it now since December. From the moment I hooked it up to my desktop system (usb out from computer, Dragonfly Red as a dac, Q Acoustics 3020s, REL TZero subwoofer) I was blown away. It has a rich, natural sound that reminded me very much of old Class A analogue, but cleaner. Notes have body and weight and presence, and it throws up a big soundstage with very precise placement of instruments and vocalists. I can easily say it sounds better than amps I might have spent over £1,000 on 10 years ago.There are a couple of annoying things about it, however. I'm not fond of using a volume knob as a power switch, and I hate having the stereo/mono switch in a place it could accidentally be knocked, though that's never happened in my case. (It seems a lot of people are really enamoured with the idea of using two of these as monoblocks, but I don't have that kind of power requirements.) Honestly, it's hard to imagine being able to use more power than it already has with the 48v brick unless you live in a detached house and have a very large listening room or very hard-to-drive speakers.This is a fantastic little bit of kit, and I've had a few through the door as I was working out which I liked best (Marantz PM6007, Aiyima D03 and A07, SMSL AO200 MKII, Topping PA5 II). None of them could quite match it. The Topping comes very, very close and would easily be my second choice because it's so beautifully clean and doesn't put a foot wrong. I just think I like a slightly meatier amp with a touch of warmth, and that's the ZA3. If you're after a less warm sound or if your speakers are really lacking in high end, I might go with the Topping, which also deserves a lot of praise.I listen to it every day, and I'm still shaking my head at how something so cheap could sound so good. I'm not sure if this is a sign I've been exposed to too much audiophile snake oil over the years or if the quality and implementation of Class D amps has just come astonishgly far in that time.I'll also add that the build quality is great, and it looks extremely nice in person.

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

Fosi Audio Za3 Balanced Stereo Mono Amplifier Hifi With Tpa3255 | Desertcart GERMANY