home audio sound system with Fosi Audio audiophile-grade amplifier

Purely for Audiophiles, Each in Its Own Way

Designed with a Commitment to Delivering the Best Sound Quality

we highly recommend

An ideal choice for Audiophiles

V3 Mono Home Audio Power Amplifier

The Next-Generation Mini Monoblock Amp

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ZA3 Home Audio Balanced Power Amplifier

Switchable Between Stereo and Mono Mode

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V3 Stereo Mini Power Amplifier
 

Premium Sound Quality with Premium Components

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P3 Tube Preamplifier Headphone Amp

Mini Preamp with GE 5654W Vacuum Tubes

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see what they’re saying

professional reviews

Fred & Sound

Audio Masterclass

iiWi Reviews

cheapaudioman

Fred & Sound

Audio Masterclass

iiWi Reviews

cheapaudioman

Fred & Sound

Audio Masterclass

iiWi Reviews

cheapaudioman

see others' setups

Crafted by Our Users

their genuine experiences

Customers reviews

Ray Lovern

The Fosi Audio V3 Mono amps, plus the 48v/5a power supply for each, has taken my system to a new level. Clarity, detail, channel separation, soundstage and instrument placement are absolutely spectacular! My system has never sounded better. Amp set up/install was quick and easy. I am pushing them hard and they do get hot. Hopefully these will continue to perform for a long time.

DC

After buying a pair of Buchardt Audio S400 MKII speakers, I struggled with muddy bass in my room. I very nearly sold the speakers, thinking my room was to blame for the poor bass integration. Instead, I bought a pair of these monoblocks. Lo and behold, the Fosi V3 monos power the Buchardts with no problem. The in-room bass response is nice and tight. The subwoofer integration works properly (after I inverted the polarity to match the amp output). I’m impressed with the sound quality and blown away by the value for the money.

RdW

Successfully shipped to South Africa, final leg completed by Buffalo Express. No damage to packaging, well protected and arrived within 2 weeks of ordering. Performs as well as ASR theCheapAudioMan claim. I bought the 48V power supply and paired mine with an SMSL DL100. It powers my 3 way towers (RF2, Bentley Acoustics) just fine. May have to buy another one and run in mono soon to crank up the juice a bit more. Overall I am very happy with my purchase.

Denni

Fantastic Amplifier and Customer Service What a great product for my application. There have been plenty of excellent reviews elsewhere about the audio performance and build quality. I've driven all kinds of speakers from Dahlquist DQ-10's to Quad ESL-63's and even some Sony SS-CS5's. Let me add my very positive opinion. I don't think enough has been said about the excellent Customer Support. I've had my V3 since June 2023. 

Radames Alvarado

Again "HIFI MADE FUN", Very Good preamp for Different uses I had good experience with the V3 amplifier, and I wanted to try the matching preamp P3 on it. The P3 is a “hybrid tube” preamplifier with 2 inputs, RCA and Bluetooth. Hybrid because it's a solid-state preamp with vacuum tubes. The tube stage is performed by GE 5654 tubes instead 6k4 like in his other brothers P1 & P2. The amp has bass and treble tone controls with a neutral click at 12.