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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&apos;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&apos;ve been using on desktop/basement set ups.

    1

  • @scottlowell493 · 4 months ago

    Early designs modulated a lot of noise above 7khz. &nbsp;The first sony class D &nbsp;in the late 70&apos;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&apos;d like to see some real, high-current monoblocks from one of these companies. They&apos;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&apos;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&apos;m looking at 5K at least. I don&apos;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&apos;re walking out of the store with kids and bags, and you push that automatic door button, and it&apos;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&apos;s. Our Odyssey back in the day and my Tacoma now are the two best vehicles I&apos;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&apos;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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