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hk870

  1. P

    Harman Kardon Recap

    I have a HK870 power amp which I purchased new about 32 years ago.Physically the amp is in excellent condition and I currently use it to power a second zone in my home. It just doesn't sound as open or clear as it once did. A year or so ago, I replaced the input coupling caps, thinking that...
    • Prudent
    • Thread
    • amplifiers harman kardon hk hk870 recap
    • Replies: 13
    • Forum: Solid State
  2. dlucy

    Harman Kardon hk870 power amp restoration

    I finally got to the hk870 sitting in my to-do stack and couldn't remember what was wrong with it when I bought it. The kind AK'er who'd sold it to me said "well, the transformer was delivering power but it wouldn't turn on" when I sheepishly asked "do you remember why you sold it?" Ok, no...
    • dlucy
    • Thread
    • harman kardon hk870 restoration
    • Replies: 13
    • Forum: Solid State
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