I had an issue with two Fosi V3 monoblocks that I bought as a pair with a single large power brick.  There was terrible static or interference (I can't remember) coming from them. I reached out to Fosi about it through the chat bot. Within 48 hours I had an email asking me some basic questions. Then they shipped me an upgraded (new) power splitter that was causing the known issue. It all happened quickly, painlessly, and free.

MY Fosi system, The V3mono are 2 years old this July. Very Solid 75db listening level on most days for 4 to 6 hours daily, I have the Time. I am retired :)

Comparison to the Fosi V3 monoblocks would be interesting. 🤔

I will always be a sucker for VU meters...

What I really like about this is that you get a 5amp power supply for each speaker.  That's nice.

VU meters! Brilliant. The nice thing about these little sub-$200 monoblocks is you can buy just one to power a center, or three for a LRC set-up, etc. Lets you customize your setup without spending megabucks.

If I had a dollar for everything you didn’t see coming 😂

Nice to see cam going back to his roots! Welcome back Randy!!

I've been running a Fosi BT10 in my restaurant for a few years m 12 hours a day at about 50% power,, BT connected to a phone running Spotify ... Bass cut and EQ on the phone.. clear sound , always connects on BT quickly.. speakers are quality 8ohm 2 ways with passive radiator and soft dome tweets. Great value... Sound quality is "good enough" as it's a noisy environment.

Ooh, GaN PSU's too - nice.
Gallium Nitride switched mode PSU's are great. They employ ultra fast switching capability vs standard silicone devices, This enables a very high frequency switching frequency which hugely improves energy density and thermal efficiency. They're smart too and can quickly switch to a very low quiescent state when required. So they run very cool and don't waste power when on standby.
Using two mono amps has another great opportunity to use ultra-short speaker cables. I'd recommend using the balanced XLR sockets for common-mode noise rejection and avoid the possibility of introducing ground loops

That design was introduced with Aiyima a70 just front is changed.

I’ve ran an SMSL A-300 in my garage paired with morel Maximo 6x9 coax’s for 3 yrs now. It’s been fantastic, plenty of output with it being an 80x2 amp at 4 ohms.

Had multiple A07s. Truly suprised me and made me realize the game is changing

Thanks for getting this review out here Randy. Have known of the pre-order for awhile, wondering when some info from you all would come out.

It's got the kind of look you don't get tired of as in little needles dancing to the music. And balanced input.
"I'll have two" never made more sense.

Fosi V3 Mono vs Aiyima A20 Mono Battle must happen.  Most agree, I think you did also that the Fosi BT dual channels lacked bass and separation.  I'm loving my Fosi V3 Mono's powering my new to me McIntosh LS350's which were very flat and anemic with my AVR's 70 watts, which had to be pushed to 70% for good listening.  The V3's have definitely brought them to life and the bass is incredible.  No sub needed.  Now I'm in the search for a good AVR pre-amp with new HDMI connections so I can get the home theater back up and running.  I had to go back to my old avr for its pre-outs as my newer one had hdmi outs (had to upgrade when I upgraded my tv)  but not pre-outs.  Didn't need the pre-outs for my KEF Coda's, but now they are the rears and the LS's are the fronts now.

5:53 Aiyima said it DOESN'T have swappable op amp

I have a Douk Audio G7 (dual TPA3255 chipset, 4-channel amplifier) powering my third (patio) and fourth (garage) audio zones via the XLR preamp outputs from my reference system's integrated amplifier.

The G7 has a few unique features that make it ideal for my application. One of the biggest advantages is that it allows you to independently select Speaker A, Speaker B, or A+B, which is surprisingly rare. The only other amplifier I found with similar functionality was the Onkyo Icon M-80, a Class A/B amplifier.

I actually tried both in my system, and while the Onkyo is a nice amp, the Douk G7 performed so well that, at around $300 versus about $2,000 for the Onkyo, it was an easy decision. I've been running the G7 continuously for nearly a year now without a single issue, and it's been completely reliable. For anyone looking to power multiple zones from the preamp outputs of a high-end system, it's an excellent value.

They should make a deluxe version that comes with the same cheap power supply components but nicer designs something that can be stacked

Great review and congrats on 500k subs! Keep up the great work 🤙