bubinga5 Posted July 3, 2021 Share Posted July 3, 2021 I have an OBP3 preamp in a bass. I love it but I get a really loud popping noise when switching from active to passive (stack pot), also a high pitched noise when switching the mid frequency stack pot. This seems to be happening only on the stack pots. What might cause this. Any ideas.? Thanks. Quote Link to comment Share on other sites More sharing options...
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