Dayvid 10+ year member
Junior Member
Whenever I turn my head unit on, I hear this loud & annoying low-frequency sound coming from my subs. My subs have worked just fine until last night. I thought that it could have been faulty wiring, or a bad ground connection, but all of that's fine. I can have my volume set to 0 & I can still hear this noise. Any idea of what could be happening?