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I Found the "Catch" with the Fosi BT20A Max

11K views · Apr 30, 2026 · Science & Technology

Comments · 61

  • @TheApartmentAudiophile · 5 months ago (edited) · pinned

    To check out the FOSI BT20A MAX: <a href="https://fosiaudioshop.com/products/bt20a-max?sca_ref=11144574.a4mx7GOEmc&amp;utm_source=affiliate&amp;utm_medium=referral&amp;utm_campaign=uppromote">https://fosiaudioshop.com/products/bt20a-max?sca_ref=11144574.a4mx7GOEmc&amp;utm_source=affiliate&amp;utm_medium=referral&amp;utm_campaign=uppromote</a><br><br>(It’s an affiliate link, which just means the channel gets a small commission at no extra cost to you. Honestly, it’s the best way to support these honest reviews and keep the record spinning. If you use it, thank you—it truly helps!)<br><br>By the way, do you think the 32V power supply is enough?

    2

  • @pierregibello7457 · 4 months ago

    So happy I found your channel. Great video, love your common sense and your pragmatic &nbsp;approach. We don&apos;t all have a huge room where we can drop two mono amps on the floor and leave 6&apos; behind speakers.

  • @diegooliveirabenjamin · 4 months ago

    Such a good channel

  • @oozyboomy · 5 months ago

    Love the Idles t-shirt! Oh and the video as well haha! Good job man! :)

    2

  • @Boogasnots · 4 months ago

    Great video. &nbsp;I own one of these amps. &nbsp;I upgraded to a good 48 volt 10 Amp GAN power supply and I have very good speakers. &nbsp; The sound and power is awesome. &nbsp;I like having tone controls too. &nbsp;Not sorry Purists. &nbsp; This amp may not have digital inputs but it does have TWO sets of analog inputs. &nbsp;You can easily hook up a good quality combo Preamp/DAC with digital inputs. &nbsp; This amp sounds great if you have good input sources and good speakers. &nbsp;I highly recommend this amp.

    2

  • @SpinTheGrooove · 5 months ago

    Wow! Another fantastic video dude. &nbsp;Really like the album recommendation segment, you’re making my wish list a little bit longer haha. Alec looking forward to the amp now. Part of me was wondering how much of an upgrade this will be over my Fosi MC101 but from your words…. I think it’ll be a massive change.

    2

  • @russfelger · 4 months ago

    LMAO! That&apos;s cute!

  • @RamsesV. · 4 months ago

    I replaced the op amp with a Sparkos Labs SS3602. They work perfectly, and I enjoy the sound. <br>The fan was replaced with a quieter Noctua NF-A4x10 3pin 5V. I also replaced the power supply with a 36V, 6A Gallium Nitride unit.

    1

  • @RainWalker24c · 4 months ago (edited)

    <a href="https://www.youtube.com/watch?v=2mIPFDiaNO0&amp;t=255">4:15</a> their 48v 10A($120us) is being advertised for the max power in their sheets. Kind of odd they don&apos;t allow option when picking device. Have to select no psu(currently not a option with max unfortunately), go to accessories, then add it from their. That makes the max $350us to get max rated power.

  • @nico3064 · 4 months ago

    I really would be tempted but for such a price I rather stick with my ZA3&apos;s . I got 4, each with 48V PSU for 390$ tax included and shipped one week before Black Friday last year .... So the bar is high for any amp 😆. <br>And I guess replacing my BT20A pro on my desktop setup isn&apos;t with it using the Fyne Audio F300

    2

  • @antonpaco · 1 month ago

    When most people talk about an amplifier, always think about power, ignoring the fact that it&apos;s the last thing to consider. The important things are sound quality and available connections. In a 50-square-meter room, 100 watts RMS is more than sufficient.

    1

  • @anilrajnarooka · 4 months ago (edited)

    Really loved your video, specially your style of presenting it. Can you tell whether this sub out can feed a cheap 2.1 sub which has 2 small satellites are connected? It is only until I buy Q3030i and svs 1000.

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