Posted August 3, 201312 yr I have 2 12 inch pioneer champion pro's. The amp I am running is an hifonics zeus 3000 watt running at 4 ohms. When the subs are played there is a knocking sound coming from in the box. I dont think the speaker is blown though because when I put pressure on the back of the box, the knocking sound goes away. Any ideas?
August 3, 201312 yr Could the box be coming apart? Maybe a loose piece of wood slapping around? Maybe wires inside the box moving around? Check all that stuff first
August 3, 201312 yr Had something similar happen with a cheap prefab. The wood completely separated and split directly in half and was wood slapping against wood and I would start smelling burning. I thought I was frying the sub. Just so happens I was basically rubbing to sticks together and causing a fire with friction lol.
August 3, 201312 yr most commonly thats the sound of wood clapping. the box is not glued or screwed well
August 3, 201312 yr Author Its a prefab box that I brought over a year ago so I guess its falling apart. Thanks for the help.
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