BASH amplifiers are great when they work

Comments · 103

• RE

  @redbeacon4871 · 2 years ago

  Love Bash they sound awesome ,but yes when they work I’ve gotten lucky with a few them still working

  4

• SP

  @speedboxx · 2 years ago (edited)

  It's interesting how the BASH amps all seem to have the same layout regardless of what the manufacturer is. Last few I remember: Energy, Mirage, Klipsch, Atlantic Technology. I almost wonder if the boards are interchangeable. I've repaired several and the problem was always bad capacitors and/or the glue that turns brown with time & heat. On all BASH amps, I'll replace the capacitors if they are >10 years old and also inspect for the discolored glue problem. I'll patiently scrape the glue off to replace with hot glue instead. I would go as far to say that for any electronics that get hot (subs, amps, power supplies) it's generally a good idea to take them apart if they are >10 years old to inspect for bulging capacitors and the brown glue.

  6

• DO

  @Douglas_Blake_579 · 2 years ago

  I ran into a problem with a sub-woofer, still bugs me today... Went out on a service call and sure enough a room full of beautiful music and the sub is dead silent. &nbsp;Oh-oh ... So I popped the plate off the back and did some checks... seemed okay. &nbsp;But when I pulled the RCAs off I got a huge room shaking blast of 60hz. &nbsp;After some considerable head scratching it turned out that my client&apos;s favourite kind of music had almost no content below 100hz. The subs were working, they just had nothing to do. &nbsp;<br>Put on a couple of selections with good deep bass and away they went.<br><br>That was a nice waste of 90 minutes that I couldn&apos;t bill the customer for.

  5

• JA

  @jasonhandy8442 · 2 years ago

  You can&apos;t beat a good quality hi-fi system

  1

• DA

  @dadbabyletsplayz5132 · 2 years ago

  I have no idea if big systems are as popular as they once were but I love having my big surround sound set up.

  1

• AT

  @atw4321 · 2 years ago

  I saw that cap as soon as you opened it IM YELLING LOOK AT THE CAP

  3

• RI

  @rickclink9196 · 2 years ago

  Even with a schematic it’s still tough. I think your small vertical board is the pwm controller that modulates the negative rail.

• AN

  @andrewwalsh5837 · 2 years ago

  Hi Dave, Andy from the UK here, never been a keen fan of class D amps, especially any amp built into a speaker case, always like things separate, I have a Dynacord powerate 1000 mark 2 powered mixer designed for bands for clubs and stage etc, at 700rms per channel great power when needed and it sounds so warm and clear in my living room at normal levels for a house, dons&apos;t evern light up on the first led on the meter, its class AB with ouput stage with 10 power transistors 5 NPN and 5PNP on each channel with 2 fans and a hefty toriodal transformer, I know not as efficient as switch mode PSU, but has class H circitiry &nbsp;which alters the voltage rail depending on demand, they now have a mark 3 version which is class D boosting 1000rms per chan, i dont doubt it with Dynacord but they are now made in China, the mk1 and mk2 where made in Germany, but Dynacord, EV Audio are all part of the Bocsh company, not vestal proper Bosch, sorry to waffel on, i&apos;m a electronic engineer and also an audiophile, love music when it sounds right, also love vintage amps stereo reicevers etc from the late 70&apos;s early 80&apos;s, &nbsp;I&apos;m going on a bit , thanks Dave love your vids, keeping them comming, always look forward to your videos

  1

• B.

  @b.powell3480 · 2 years ago

  Last time I tried to work on a bash amp, I wasn&apos;t able to get to anything on the circuit board because it had been potted with this black goo/glue material that I couldn&apos;t remove without destroying the whole thing!!

  1

• TH

  @TheDivergentDrummer · 2 years ago (edited)

  Check out Q5 between the 2 caps. &nbsp;It looks to be on the power supply side of that small daughter board. &nbsp;Looks like it sharted! (look about <a href="https://www.youtube.com/watch?v=TABY8WFvMoA&amp;t=440">7:20</a>-<a href="https://www.youtube.com/watch?v=TABY8WFvMoA&amp;t=446">7:26</a> or so) <br><br>Also, not an exact schematic and SM, but there is one available for the Klipsch-Rw-12 on manualslib. &nbsp;Has a decent component breakdown for that model, amp operation theory, and schematics. &nbsp;I suspect the 2 MAY be similar, so it can point you in the right direction. &nbsp;I&apos;ve never actually looked into Bash amps, so this is a learning experience for me too :D

  3

• DE

  @Desert-edDave · 2 years ago

  <a href="https://www.youtube.com/watch?v=TABY8WFvMoA&amp;t=1530">25:30</a> Computer motherboards share a ground with the chassis, as well as other industries - it&apos;s &gt;very&lt; common practice.

• RI

  @rickclink9196 · 2 years ago

  These Bash plates are a pain. I have one now from an expensive Dynaudio sub. There are some schematics available but nothing exact. They are overly complex. It’s a class g bridge amp. I have the 80 volt b+ voltage but they modulate the negative rail to save power! This is controlled through the Bash pwm board. Very close to quitting!