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high pitch

  1. M

    Adcom GFP345

    Hi everyone a friend of mine has a problem with his ADCOM GFP-345. He got those high pitched signal tone about 5700 hz from time to time from his GFP345 in both speakers. It disappears and come back again and again. When the music plays loud then he does not hear these signals but sometimes the...
    • Marantz22xx
    • Thread
    • capacitor high pitch noise preamp noise schematic service manual
    • Replies: 16
    • Forum: Solid State
  2. JayPare

    Yamaha NS-430 high pitch sound from mid-range drivers

    I recently acquired a Yamaha system which consists of a CA-410 amp, a CT-410 tuner, a YP-211 turntable and a pair of NS-430 speakers. I traded everything for my Akai AM-U02 receiver. I didn't test everything yet but I plugged the speaker to my Toshiba SA-300 and I hear a high pitch sound from...
    • JayPare
    • Thread
    • driver high pitch mid-range sound speaker yamaha yamaha speakers
    • Replies: 5
    • Forum: Speakers
  3. V12_eagle

    Pioneer Elite M72, Bias Problems- Need your opinion

    Hey guys, I finally decided to attempt to repair the Pioneer Elite M72. The unit was stored away for many years because it was in protect mode (red) light. I have been doing some research because my limited experience repairing electronics, so I got into it and found the power Amp assembly...
    • V12_eagle
    • Thread
    • bias adjustment high pitch pioneer m72 shorted output
    • Replies: 12
    • Forum: Pioneer Audio
  4. V12_eagle

    Pioneer Elite M72, Bias Problems- Need your opinion

    edit post sorry double post
    • V12_eagle
    • Thread
    • bias adjustment high pitch pioneer m72 shorted output
    • Replies: 0
    • Forum: Pioneer Audio
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