the OP has a small Pioneer amp - I am sure that 10 gauge is more than enough.i think you need to upgrade your ground and check to see why it did that. what have you done so far?? whats the size on your pos and neg wire ??
this is the reason why i groaned the **** out of him lolSame sub, same amp, same settings could only be 2 things then
Wiring or your headunit has a different output voltage then the deck did in the other car.
I would think it is the HU voltage however we can pray on it if you want and seek Jesus's guidance on this matter. LOL