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    GK MB150S buzz

    I recently bought a used GK MB150S amp. And I found out after playing for a while (20-30min-ish), the amp starts buzzing even when every knob turned all the way down, bass unplugged, and the internal speaker disabled. The amp is plugged straight into the wall outlet, no extension cord used...
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    Double Bass PJB BG120 vs GK MB110

    I’m looking for a lightweight amp for practicing electric bass at home and playing jazz duo/trio gigs on the upright bass with light drummers, especially when there’s no backline amp at the venue like small bars and restaurants. I’ve narrowed it down to the PJB BG120 and the GK MB110. Both...