Polk PSW505 Sub Woofer - Troubleshoot & Repair

Comments · 211

• SA

  @sasquatch_in_flipflops · 2 years ago

  This is one of the clearest and best produced explanations I've seen on YT for any topic.  Bravo.

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• GE

  @geeezush · 8 months ago

  I could not be more impressed with your skills and your video!   I'm an old EE but I learned some awesome magic from you here!   I was not familiar with in circuit capacitance testing.    Really appreciate your time!!

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• KE

  @kevinswett1964 · 4 years ago

  I own this subwoofer and the amp also appears to be blown.  No way do I have the know-how to do the troubleshooting and repair like you.  Just wanted to say I'm amazed at your work, and that there are people out there with such a thorough understanding of these electronics systems.  Love it.

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• FE

  @fendray26 · 5 years ago

  Dennis, thank you so much for the time you put into recording your repair, editing, note taking, etc. For years I've been wondering why no one had done this long ago. These subs have been problematic for a very long time.

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• MA

  @markyannitell8508 · 6 years ago (edited)

  This is a very good fix it video, love that you added the parts list.  Talk about piss poor caps!   I own two of these subs, both committed suicide while not even being used, each pushing up daisies in their own strange ways.  The first one died with a straight THUMP DC to the speaker, no audio output.   The other one, similar to the one you worked on.

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• VI

  @VincentAnzalone · 5 years ago

  18 cent part is causing the sub to turn off. Mind blowing. Thanks so much for this info. Won't need to buy a new sub woofer.

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• DA

  @DarronSanderson · 3 years ago

  This tech is very good at what he does.

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• CO

  @connorbramel7368 · 4 years ago

  saved me from trashing my 2 year old sub! Had the same zener diode burnt up, swapped it and works good as new<br>Thank you!!

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• LI

  @livelucky74 · 5 years ago

  I have two of these subs and both have tis exact same problem... I&apos;m pretty handy and was thinking hopefully I could just replace a couple caps or something to fix it. &nbsp;After watching this I think I&apos;m just gonna buy new ones lol

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• SI

  @silverpantsblue.1780 · 5 years ago

  Bought this sub (bought 2 of them) based on the 5star reviews. One arrived DOA and I was refunded, but they did not want the sub back. I found this video as I started to look for the potential for a repair and essentially get a free sub. Thanks for putting this content out there.

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• DA

  @dangerdonny · 5 years ago

  One of the best videos I have seen on Youtube in a long time. Awesome work. I could never do it, so if you change your mind about doing repairs, I could send you my board and you could give me an estimate. :)

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• JO

  @johnsakoff-bh8jr · 3 years ago

  Mine died a few weeks ago. &nbsp;I just finished the repair. &nbsp;I scoped the 57VDC output from the power supply and it was an absolute mess. &nbsp;Lots of AC leakage. &nbsp; Broke out the ESR meter and there were a bunch of caps that were either flat out bad or very close to the edge of being out of spec. &nbsp; I wound up replacing all the electrolytic &nbsp;caps on all three boards with the exception of the large power caps. &nbsp;I used high quality Panasonics so hopefully this will last a a few more years. &nbsp;From troubleshooting to repair it was about three hours of my time and $25 at Digi-key.

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