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s1001

  1. Brice

    Help with preamp noise/hum

    Hi guys, I am working on an Acro S1001 preamp, and I am facing terrible noise/hum with it. I located where the noise is coming from: the tone control. Here are the symptoms: When the balance it to ground: no noise at all. Dead silent. When the volume is at ground, noise is present. If I...
    • Brice
    • Thread
    • acrosound preamp s1001
    • Replies: 6
    • Forum: Tube Audio
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