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 PowerClimatePartner certified

I first encountered the Fosi monoblock V3 for use in a music-only system and was blown away by its transparent sound and high power for such a tiny box at such a low price. I began to think about deploying more of them as a possible upgrade for an older (but top of the line) Onkyo Dolby Atmos AVR in a 5.1.2 Atmos layout, using the Onkyo's preamp outputs rather than the internal amps.So far I have installed 3 of them, powering the from L & R and the Center Channel. As I expected. everything sounds better. The sound is more detailed and accurate, imaging is more precise, dialog emerges more clearly from other soundtrack elements. I look forward to soon adding more V3's to complete the surround channels and the height speakers, but the listening experience is already so impressively improved.The way these amps power on and off based on detection of signal has functioned perfectly with no delays, popping sounds or any other negative aspect. They just work. I was always pleased and proud of the high fidelity of my AVR, but this has been an extremely high value upgrade that has put it into a whole other category. HIGHLY recommended!

I wasn't expecting this much from a device like this. I have two 12 infinity subwoofers that are dual voice coiled. My thought was to give these a try in the off chance they can actually push the sub. I tried both 8 and 2 ohm configurations on one subwoofer and I am really impressed. 8 ohm, the subs were happy, I would guess they were getting around 130-140 watts as expected. The damping is impressive with 8 ohms as everything sounded amazing and tight with true accuracy of the sounds it was able to produce. When I tried 2 Ohms, that is when I laughed out loud due to my shock on how much current this thing can produce! I'm not going to say it was crazy but it was truly getting there. I'm not sure if this can double the power at 2 ohms but it did seem to be producing more then 300 Watts RMS with ease. I have a 400 Watt RMS amp and this thing is right up there with it.My plan now is to get 4 of these and pin each amp to a voice coil to provide 480 Watts RMS (240W per voice coil) to each subwoofer. While it performed well at 2 Ohm I feel a 4 Ohm load might be a slight bit better on damping.For the price these things are absolutely amazing, I am now figuring out if I need to run a dedicated 20AMP service for my audio equipment cause these alone will draw 14 Amps when they hit. I'm pretty sure I will trip the circuit breaker on a 15AMP with the rest of my gear if I don't upgrade it.

Got two these working as L, R, with a denon avr, feeding a pair of kef r3 and they are amazing, really clean and effortless sound, they get a little on the warmer side but my x3800h is even hotter to the touch than the v3 mono, the standby wake up option works every time. 10/10

The V3 mono is a steal at this price. So much power in such a little package. I bought two for my desktop setup. I run them balanced from a SMSL Raw MDA1 and into Klipsch RP600m. They sound amazing. I don't think it can get any better at this price. My only complaint is that they get way too hot. Sometimes too hot to touch. I added a heat sink to both of them, which helps.

works great and sounds great

I previously owned the Aiyima A07, and loved that it could decently power RB42's, which are notoriously inefficient speakers with great bass. When turned to 10 o' clock, that amp could get them to play around 75 dBa.However, after I bought these, it's become apparent how much less distortion these monoblocks produce. Additionally, they are so powerful compared to the A07 that I can run them at the 25 dBA gain and reduce the VRM of my DAC to minimize distortion and maximize SINAD. I don't have measurements, but everything is just more transparent and silky smooth.They don't run particularly hot at 25 dB gain, just warm to touch. They're handsome and slim. Auto mode is nice and I hope it saves me a few $ in electricity over the years.If you're willing to spend $300 for a stereo setup, these are a no brainer. You just need a pre-amp of some kind, and a Mackie Big Knob Passive 2x2 will work great.

I bought two of these as an experiment to compare against five other dedicated amps that I own - (Adcom, Outlaw (80 pounds), Emotiva XPA, HK Citation, and Onkyo) -various models and years from 2022 to the 80's with the Citations. Coupled to the Topping D90 and the Topping P90 Pre Sabre and playing through a pair of Sonus Faber floorstanding speakers, my initial thoughts were that they were a bit too transparent and thin. I was confident.that my amps some costing over $1600 were superior and that I would shuffle these tiny monoblocks in a seperate surround system as drivers for Dolby Atmos channels. Well then I read about Sparkos opamps. I ordered four of the SS3602's and the story changed. Hard to believe but these little devils improved the presentation beyond my expectations. The clarity and tightness of bass is still excellent but the vocals seem insanely good- holographic. Incredibly I would even say that they sound better now than any of these other amps using this combo. I have learned that the synergy between preamps, dacs, amps, and speakers makes a big difference. An enjoyable hobby which now just got a lot cheaper!!

Great amp for desktop great value super clean. Not recommended for home theater