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shrieking

  1. ZCurves

    Marantz 4070 - Super Shrieking

    Greetings ! I have a 4070 Quad Amp with the SQA-2 board. It was working fine- plays for a while then out of the blue it starts Shrieking and Screeching at very high volume. There is no way to turn it down, it is just full-on Shrieking and Screeching assault. I have to power off to preserve...
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