A Budget Amp That Fixed Class D's Problems... Then Added One More -Fosi BT20Aa Max
29K views · Feb 10, 2026 · Science & Technology
Comments · 73
@MattCoykendall1 · 7 months ago · pinned
Hey! What's going on? Let me know! and if your interested check out the Fosi BT20A Max here: <a href="https://amzn.to/4ckEcuD">https://amzn.to/4ckEcuD</a>
3
@LakusPakus · 5 months ago (edited)
Looks great. I miss the old power switch tho. That ~click~ is so nice.
2
@DonnieMulligan · 7 months ago
Another nice job, Matt. Cool sneak peak of the Voxativ Albertich speakers. those drivers are next level.
1
@rich7049 · 7 months ago
Another good review, thanks for putting in the time to get these done. I would love to see you review the Emotiva A2LA+. It seems like a great value for a true A/B amp, and I trust your opinion. Keep up the good work.
@vendelius · 7 months ago
Great Informative Review.. Thanks and Take Care
1
@hobbespal2344 · 7 months ago
Thank, Matt. I like this as an upgrade to earlier Fosi amps I've been using on desktop/basement set ups.
1
@scottlowell493 · 4 months ago
Early designs modulated a lot of noise above 7khz. The first sony class D in the late 70's was brutally harsh, but made a good sub amp.
@AlonzosTech · 7 months ago
Nice upgrade to the BT20A, using with TV and Audio Engine passive speaker on the TV cart in the garage.
1
@tmdillon1969 · 7 months ago (edited)
I'd like to see some real, high-current monoblocks from one of these companies. They've definitely done a ton of good work with things like these types, but it would be nice to see a pair of monos with output specs that rival Crown, Orchard, or Buckeye. I bought the V3 some years back, and while it sounds way better than something that price should, it's nowhere near the stated specs. Matt and I both run CSS 1TDX, and they need some beans to shine. To replace my 17-year-old Bel Cantos with modern models, I'm looking at 5K at least. I don't need the volume knob or meters. Just really high current wattages. As for the car....we were a family of 5 in an SUV. The AC died, and the repair was half the value of the vehicle. After years of looking at them with stink-eye we test drove an Odyssey.....OMFG..... There is no better family mover! The kids have been grown up for years, and I still miss that damn thing. Better sound systems, better safety ratings, better gas mileage, etc. You're walking out of the store with kids and bags, and you push that automatic door button, and it's like a troop carrier for crumb grinders. Our dear friends had one too and family across most of the country, and they put 300K on one without a hiccup. They just eat miles on road trips. And you can drop the seats into the floor, fitting an amazing amount of stuff into one for those trips to Lowe's. Our Odyssey back in the day and my Tacoma now are the two best vehicles I've ever owned by far.
1
@ChrisPTA · 7 months ago
Thanks for sharing
@Adi7x · 7 months ago (edited)
The latest produced Fosi ZA3 have pffb to. Only the old ones don't.
@a_room_without_a_view · 6 months ago
Have an Aiyima A-07 pro connected to and older tv via rca cables, active subwoofer, and 2 front channel sparks. Looking for suggestions to hookup a center channel speaker and possibly some rear speakers. Suggestions for any D class amps to make it a 5.1 system?
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