2015 Audi A3 Aftermarket Amp & Sub buzz

GainzL

New Member
I’m getting frustrated. I recently added an aftermarket amp and subwoofer to my 2015 Audi A3. Everything sounds great. Amazing UNTIL I set the volume on volume 0 the after market sub buzzes super loud. If I open the trunk on volume 0 there is no buzz.... what can this be? Please help it’s getting annoying!!!!
 
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