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thump in speaker

  1. H

    Yamaha A-1 amplifier thump on power off.

    Hi, I have a Yamaha A-1 that I’ve been working on and is now sounding great and has stable readings for Drive Circuit DC Offset, Idling Current, Power Supply voltage as per the manual. But, powering off just now by pressing the power button on the amp led to a substantial thump through the...
    • Hifibythekg
    • Thread
    • a-1 power supply thump thump in speaker yahama amplifier
    • Replies: 89
    • Forum: Yamaha
  2. klamsoss

    B&K ST125.2 power-off thump

    Please forgive me if this is a noob question, but I'm relatively new to DIY repairs on audio gear, and most of my experience s basic cap replacements on tube amps. I have a B&K ST125.2 amplifier, which I think sounds very nice indeed, especially with my current-hungry Thiel CS2 speakers. I...
  3. starcopy

    MCS 3233 with several issues to fix

    Hi, MCS fans. Just found a decent-condition MCS 3233. I see and hear the potential in this well-made receiver. Not sure if it will need components replaced -- that comes later. Right now I’m working through the 3233 functions, switches, dials, connectors, jacks, etc. to see what I’ve got here...
    • starcopy
    • Thread
    • 3233 documentation 3233 phono 2 function ceramic cartridge electrical shock faulty relay jc penney jcpenney mcs 3233 properly grounded thump in speaker
    • Replies: 36
    • Forum: Solid State
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