This $150 Amp Will Disrupt the Market
94K views · Jul 29, 2026 · Autos & Vehicles
Comments · 294
@wal · 2 months ago (edited) · pinned
If you are curious how this amp can put out more power than the power supply is rated at 48V 5A (240W), you should see it explained in this video: <a href="https://www.youtube.com/watch?v=c7QELbpKMuI&t=490">https://youtu.be/c7QELbpKMuI?si=Ru8-58-sbckWJygn&t=490</a><br><br><b>VIDEO CHAPTERS</b><br><a href="https://www.youtube.com/watch?v=e5-TQb_rm4M">0:00</a> Intro<br><a href="https://www.youtube.com/watch?v=e5-TQb_rm4M&t=37">0:37</a> Unboxing the A20 Mono<br><a href="https://www.youtube.com/watch?v=e5-TQb_rm4M&t=56">0:56</a> Marantz MA500<br><a href="https://www.youtube.com/watch?v=e5-TQb_rm4M&t=130">2:10</a> Features and Specs<br><a href="https://www.youtube.com/watch?v=e5-TQb_rm4M&t=300">5:00</a> Input Issue?<br><a href="https://www.youtube.com/watch?v=e5-TQb_rm4M&t=384">6:24</a> Sound Demos<br><a href="https://www.youtube.com/watch?v=e5-TQb_rm4M&t=464">7:44</a> Amp Dyno Tests<br><a href="https://www.youtube.com/watch?v=e5-TQb_rm4M&t=655">10:55</a> What's Inside?<br><a href="https://www.youtube.com/watch?v=e5-TQb_rm4M&t=735">12:15</a> PROS and CONS<br><a href="https://www.youtube.com/watch?v=e5-TQb_rm4M&t=785">13:05</a> Thoughts<br><a href="https://www.youtube.com/watch?v=e5-TQb_rm4M&t=806">13:26</a> Using Powered Subwoofer<br><a href="https://www.youtube.com/watch?v=e5-TQb_rm4M&t=855">14:15</a> EXTRA Tests<br><br><b>See Previous Related Videos</b><br>Aiyima A80 Amplifier/DAC: <a href="https://www.youtube.com/watch?v=zsGOs2H-HVQ">https://youtu.be/zsGOs2H-HVQ</a><br>Dayton Audio CS1200 Subwoofer: <a href="https://www.youtube.com/watch?v=0oXPyAP0p_4">https://youtu.be/0oXPyAP0p_4</a><br>Fosi Audio V3 TPA3255 Mono Amp: <a href="https://www.youtube.com/watch?v=2x5v00XYJ6k">https://youtu.be/2x5v00XYJ6k</a><br>Mini Home Amplifiers Playlist: <a href="https://www.youtube.com/playlist?list=PLu98-M_EowHOB4Wq_Mzi-FtOUpJxQQnDf">https://www.youtube.com/playlist?list=PLu98-M_EowHOB4Wq_Mzi-FtOUpJxQQnDf</a><br><br><b>SHOP</b><br>Aiyima A20 Mono Amplifier: <a href="https://amzn.to/4vZtO1N">https://amzn.to/4vZtO1N</a><br>Aiyima D20 PreAmp/DAC: <a href="https://amzn.to/4z2pdia">https://amzn.to/4z2pdia</a><br>Dayton Audio CS1200 12" Powered Subwoofer: <a href="https://amzn.to/4biBt3I">https://amzn.to/4biBt3I</a><br>Elac Bookshelf Speakers: <a href="https://amzn.to/4yLEsMf">https://amzn.to/4yLEsMf</a><br>My Favorite Speaker Banana Plugs: <a href="https://amzn.to/44TJbOh">https://amzn.to/44TJbOh</a><br>(used) Marantz MA500 Amplifier: <a href="https://ebay.us/dRqaNc">https://ebay.us/dRqaNc</a><br><br>Support OSS / Williston Audio Labs for early access to videos: <a href="http://www.patreon.com/OldSchoolStereo">http://www.patreon.com/OldSchoolStereo</a><br>One Time "Tip" for Video Support: <a href="https://paypal.me/BigDWiz">https://paypal.me/BigDWiz</a><br><br><b>VIDEO AND AUDIO GEAR</b><br>Camera - iPhone 17pro 1TB - <a href="https://amzn.to/4cNDeWo">https://amzn.to/4cNDeWo</a><br>RODE Wireless Go III Microphones: <a href="https://amzn.to/49ff46b">https://amzn.to/49ff46b</a><br>Shure MV7+ Microphone: <a href="https://amzn.to/426XGwO">https://amzn.to/426XGwO</a><br>Zoom H45 Audio Recorder: <a href="https://amzn.to/4tKUzH2">https://amzn.to/4tKUzH2</a><br>960 LED Panel: h<a href="https://amzn.to/4cYtmcM">https://amzn.to/4cYtmcM</a><br><br><b>TEST BENCH EQUIPMENT</b><br>SMD / D'Amore Engineering Amp Dyno (AD-1): <a href="https://is.gd/wccad1">https://is.gd/wccad1</a><br>XS Power D1400 Batteries - <a href="https://amzn.to/4eqkY8h">https://amzn.to/4eqkY8h</a><br>Taramps Smart Charger 100/130A - <a href="https://amzn.to/4t9vYuj">https://amzn.to/4t9vYuj</a><br>Fluke 1000A AC/DC Clamp Meter: <a href="https://amzn.to/4dfbZpg">https://amzn.to/4dfbZpg</a><br>Handheld Dyno AMM-1: <a href="https://amzn.to/4n4ktTp">https://amzn.to/4n4ktTp</a><br>My Favorite Precision Screwdriver Kit: <a href="https://amzn.to/42DrIIz">https://amzn.to/42DrIIz</a><br><br><i>DISCLAIMER: This video and description contains affiliate links, which means that if you purchase from one of the product links, I may receive a small commission. As an Amazon Associate I earn from qualifying purchases. As an eBay Partner, I may be compensated if you make a purchase</i>
18
@antibrevity · 2 months ago
I really appreciate that you always convert the older currencies to their modern equivalents as this greatly helps viewers understand a vintage product's value and affordability in its day.
53
@my77stang · 2 months ago
you had me at vu meter
14
@patflat456 · 2 months ago
Love your content man. A very comforting retreat for 15 minutes from a very stressful world. Appreciate you and your energy.
17
@thebkg · 2 months ago
The lack of volume was due to a voltage mismatch. The 4V rating of the XLR means that it can take upto 4V, which is a Pro Audio zero reference signal level. However, it also means that the internal Amp Needs 4V in order to produce its max volume when using the XLR input. <br><br>Realistically they should have included a gain control in order to match input voltage sensitivity for the amplifier. I think they included the XLR simply for connecting to a Pro AV mixer or similar source. Home AV gear with XLR outputs don't always use a 4V signal reference. They're only using XLR for Balanced Audio which eliminates a significant portion of EMI buzz and other noise sources.<br><br>The use of the 4V signal will probably cause more problems for this Amp than it solves. For anyone wanting to purchase I'd recommend sticking with the RCAs unless you know your preamp source is using a true 4V signal.
37
@TheKnobCalledTone. · 2 months ago
I'd buy it just because they're so honest with their power ratings.
35
@Adam-nv9zo · 2 months ago
Seems legit for the price point. Great video as always, Big D.
3
@Aranda-n5j · 2 months ago
The HPF is second-order, 12 dB/octave.
2
@CameronMangel · 2 months ago (edited)
I do like the power supply being seperate if its not a propitatry connector which makes it nice to replace if it fails, or power it some other way. But built in is nice to, but you do not get the replacement if its built in, we cannot win 😭
3
@TheoriginalRcRat · 2 months ago
Was hoping you would test these 😎👊
3
@Garylohr123 · 1 month ago
Good to see you doing these mini amps .great format for you to get into .Glad to see you here !
@1toonhead · 2 months ago
What a great little amp
2
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