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🎶 Unleash studio-grade power in a sleek mini chassis — your speakers’ new best friend!
The Fosi Audio ZA3 is a compact, dual-mode Class-D amplifier delivering up to 235W in mono and 155W per channel in stereo. Featuring balanced XLR/TRS inputs, premium audiophile components, and advanced heat dissipation, it offers exceptional clarity and low noise. Its op-amp rolling capability lets users customize sound, making it a versatile powerhouse for desktop, bookshelf, or home theater setups.



















| ASIN | B0CLP4T5L7 |
| Best Sellers Rank | #17,593 in Electronics ( See Top 100 in Electronics ) #43 in Home Audio Amplifiers |
| Brand Name | Fosi Audio |
| Customer Reviews | 4.6 out of 5 stars 1,216 Reviews |
| Item Dimensions | 15.5 x 18.4 x 5.1 centimeters |
| Item dimensions L x W x H | 15.5 x 18.4 x 5.1 centimeters |
| Manufacturer | Fosi Audio |
| Material Type | metal |
| Maximum Output Power | 235 watts |
| Maximum Supply Voltage | 48 Volts (DC) |
| Maximum supply voltage | 48 Volts (DC) |
| Minimum Supply Voltage | 24 Volts (DC) |
| Minimum supply voltage | 24 Volts (DC) |
| Model | ZA3 |
| Mounting Type | Surface Mount |
| Mounting type | Surface Mount |
| Number of Channels | 2 |
| Output Power | 235 Watts |
| Part Number | ZA3 |
| Specification Met | RoHS |
| Unit Count | 1 Count |
| Voltage | 48 Volts |
Y**N
Great HiFi democratized!
These small class D amps are exceptional value for money! I have amps that cost 20 times more than the ZA3 but does not deliver even 5 times the performance. I tried this (just for fun) with my power hungry Sonus Faber Sonnetto I bookshelves and it managed to make them sing beautifully up to the max volumes I listen to (70-80 db). I use two of them in mono mode to power my desktop speakers mainly for nearfield listening. The only thing I miss is a high low pass filter for the sub output. This is honestly exceptionally priced HiFi! The performance makes the price a steal! And I am so inclined to build an entire system of Fosi products just to compare its performance to price against my other ridiculously priced higher mid-range systems, which I 'm sure this will give a run for the money! I heard some premium and expensive high-end amps, and this definitely does not compete with them (I mean, come on if you're expecting this!), but for mid-range and other entry level products, I believe this thing is a certified LGK!
R**.
Great Pint Sized Amplifier !
What a monster amplifier in a pint sized metal box. Get two & go mono with 250 watts per channel and watch those those tough speakers rise from the dead.. Add some Burson Audio Vivid V7 Op-Amps in it and man this thing becomes a beast with all that 48v d.c power input ! At this price it's crazy how they make it possible to get so much !
R**J
Happy with the sound
Can’t get better than this for the price.
V**K
Compact
Thanks
P**A
Great product
This is my second ZA3. Now I’ driving both in mono mode with a ZD3. Sounds good!
K**R
New Audiophile Problems: Old audio philessss Call It Cheap… I Call It “Working.
If you’re thinking of trying something new, just go for it. You won’t be disappointed. I bought one ZA3, liked it… got excited… and ordered another one. ( Because why not? I can afford a mono block :) now) I guess I’m the new audiophile on the block now 😎🥃. I’hv got Cambridge, NAD, Marantz paired with KEF ls50 passive older ones , Rp600 m2 , So when I tried two ZA3s, I thought I’d reach that high level niche sound which I dnt know even hw that sounds . You know those YouTube guys brag about. I didn’t reach that level of euphoria or goose bump . Maybe I expected too much, or maybe I still need to tweak a few things here and there. Could be both 😂 Note: I tried it with the ZD3 DAC the Fiio K11 and smsl m300 with xlr connection no loopholes :) boys we do xlr also right . If you’re reading this, you probably have one DAC in that league too. So boys… see you soon at the next audiophile or video files meet 😎🎶📽️ But one thing I can clearly say: One ZA3 in stereo is money well spent.
K**F
Świetny wzmacniacz za nieduże pieniądze.
Zakupiony do współpracy z Wiim Ultra, spisuje się doskonale. Opcja trigger działa idealnie, wzmacniacz włącza się razem ze stramerem. Bardzo dobra jakość dźwięku. Bez problemu napędza kolumny zarówno podstawkowe jak i podłogowe. Szczerze polecam!
R**S
Affordable and very effective
A critical part of what is becoming a very beautiful sounding system. I have an older set of kliptsch tower speakers and sub. This amp(s) drives sound that is clean and true. I have since purchased another ZA3 and am driving them in mono mode. Very good quality Very user friendly Very highly recommended
M**5
Efsane!! Fosi Za3 Stereo!!
48v 5A adaptörü takıp kendi dahili dac.ı rca ile denedim evet ilgi çekiciydi fakat standart bi d -classtı. Daha sonra 3 adet muses02 opamp sipariş verdim ve elime ulaşıncaya kadar amfinin yanmasını bekledim. Nihayet geldi opampları değiştirdim ve sub opampı devre dışı bıraktım(kullanmadığım için) vee Xlr (cardas golden cross) ları bağlayınca vaaay müthiş ses!! Birçok pahalı amfiyi sınıfta bırakır çok net!! Opamp yükseltmesi yapıp güzel bir Xlr ile kullanınız şaşırcaksınız....
D**E
Klink goed.
Klinkt echt prima. Aanrader. Werd ook tijdens een hittegolf nauwelijks warm.
Q**M
Amplificador de Altavoces Balanceado
El Fosi ZA3 es un amplificador bastante económico con mucha potencia. No altera el sonido y reproduce exactamente la calidad de la fuente/DAC. No se aprecia distorsión y el balance es bueno. Muy importante la capacidad de usarlo como Monoblock si se implementan dos unidades. Pros: - Rendimiento/Precio imbatible. - Potencia de sobras y capacidad de hacer monoblock con 2 unidades. - Conexiones traseras, RCA - XLR - SUB Out. - Facilidad de uso y conexión. - Unidad con un tamaño perfecto, no aparenta tener la potencia que tiene por el tamaño. Contras: - Podría ser más sencillo de encender y apagar. - Petaca de alimentación de 48V bastante voluminosa (Entendible).
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