MrBill Posted April 18, 2023 Share Posted April 18, 2023 My R-115SW is about 4 years old. When i adjust the gain control, it makes a scratching noise through the speaker, kind of like a dirty potentiometer. The sub still works fine, just wondering if this is a common issue. Quote Link to comment Share on other sites More sharing options...
wuzzzer Posted April 18, 2023 Share Posted April 18, 2023 Not common that I’ve heard. The old trick to try first is power off the sub then turn the gain control all the way up and down really quickly 50-100 times and see if that helped. Quote Link to comment Share on other sites More sharing options...
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