Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp with TPA3255, 240W for HiFi Home Theater AVR Receiver Component, RCA/XLR Balanced Inputs 48V/5A Power

The four channels of the TPA3255 amp chip are all utilized in a parallel arrangement in this amp. This means the dampening factor on your speakers is x2. If you have a 6ohm speaker this amp sees it as a 12ohm load. Add to this great topology the feedback filter placed at the output stage (PFFB) and you’ve got two unique features above and beyond most class D amps in this price range or higher. It makes for a great sounding powerful amp that can drive just about anything. These can get hot so I immediately replaced the pitiful squirt of thermal compound with Thermal Grizzly Duronaut (which basically performs extremely high without drying out). I then removed the rubber feet from the bottom and strapped on a 150mm aluminum heatsink with a thermal pad between. I then use the amps upside down so the heat goes straight out the top heatsink. Normally it spreads through the bottom and around the enclosure creating a cute little oven for your components. Roll op amps to improve sound, use at least a 48V 5A power supply and Bob’s your uncle !

Works as expected. It is powerful and works great with my 10" Kicker Solo Baric in a sealed box. I did need to add a line level amplifier (Douk Audio L1-MiINI Stereo Line Level Booster Amplifier Audio Preamp 20dB Gain + Volume Control) between the source and this amplifier to get the power I wanted, but the amplifier delivers. It gets warm, but not hot as some people have experienced. It also looks nice and goes well with my S.M.S.L. RAW-HA1.

Died on me after maybe a month or so. I'm going to have to put it in for warranty replacement, but this is just unacceptable in general.

I bought this to power my Klipsch center channel RP-504C. I'm pleasantly surprised with the outcome. The clarity, detail and volume on the center speaker is now much better than it was running off my Onkyo RZ30. It always sounded a little muddy. The auto on function works well and the small size is a plus. The only negative is it does get quite warm.

I am using this to power one 12" subwoofer. I am using it in conjuction with the Rolls subwoofer crossover. This tiny little amp is amazing. The power supply is bigger than the amp. It drives a 12" sealed sub very cleanly to moderate to somewhat loud levels.

Excellent sound with these mono amps running them with a wiim ultra connecting with xlr connections from rca line out. The amps a very quiet and have a decent sound stage. The speakers are Martin Logan motion 40 and I was able to achieve 92db with no distortion or clipping. Compared them to the Aiyima mono amps and they felt underpowered even with the same TI 3255 chip. Since I wrote the original review I added two more of these Mono Amps to my system . My speakers have two sets of terminals so I I set up a true bi amped system. The amps paired with my Martin Logan sound incredible. The sound is actually amazing with clear definition between high and lows And what amazing low end response, my system has never sound quite this good. Theses Mono amps are connect via xlr inputs . Highly reccomend

I like it it's work good with my sub

Great sounding amp but not reliable in my experience. The first one was DOA, it didn't work at all. I returned it to amazon. The replacement was great, I bought it 4 months ago, I use it to amplify my synths in mono at home, today it's no longer working. I would buy another but being defective 2 for 2 I just don't trust it will be any better.

Incroyables ampli pour un tarif hallucinant. Équipé en 7.2.2 dans une salle dédiée hifi et home cinéma, j'ai acheté 3 amplis pour alimenter mes 3 avants Dali Rubicon. Je redécouvre la musique et les films. Plus d'impacts, plus de précision, plus de clarté, plus d'immersion. Plus, plus, plus. Ça a un impact sur l'ensemble du système. J'avais acheté l'an passé un ampli de puissance à 1400€ et 3 canaux déçu de l'amélioration. Avec ces amplis c'est le jour et la nuit Ils chauffent un peu mais sans plus dans un meuble ouvert. Je n'en reviens toujours pas du gain qualitatif. Je conseille à tous mes amis d'investir au moins pour la stéréo. Un seul inconvénient trop de fils à rajouter ( 6 rca, 3 cordons d'alimentation). Ce n' est pas négligeable mais pas rédhibitoire. Merci Fosi.

This thing rocks. Hear the finest audiophile quality.

Bought new life back to my system sounds great and compact too.

Fosi Audio V3 Mono. A couple weeks ago i recieved 2 V3 mono amplifiers i'm very pleased with them! They sound incredible with my aune S9 c pro dac with trs out from V3 mono in to my S9C dac with xlr female.Incredible value higly recommended!

I had read some reviews, as I am interested in this market a lot, already owning a Fosi V3 and a pair of Aiyima A07 Max's... I had very high hopes for the Fosi V3 mono amps, and was not disappointed! Fresh out of the box they were a little tight and congested sounding, just a bit-no blooming of the sound... Well, 5 hours later and wow!! What a difference! The sound-stage is deep, wide and very clear, with no shortage of power, that's for sure! They sound so good they have already replaced my other monoblock amps! Bass is deep and very tight, the midrange is clear and open, highs are not shouty but again clean and well balanced top end. Excellent input choices (RCA and XLR) and simple controls... Having heard several of these TI 3255 chip amps, all have a similar sound, but the additional realism of the V3 mono is quite audible! And you can swap audio op-amps as well! A killer deal on the amps right now! Buy a pair- you won't regret it! :) Edit: I've been listening to these V3 mono amps for about a week now, and I am BLOWN away by the amount of sound these amps reproduce! True giant killers! I'm more than pleased with these amps! Buy some! :)