I have a Lanzar Vibe425 1000w amp with one 15" hooked up to it that started giving me problems, any time the amp is powered up the sub pulsates making this low rumbling noise and doesnt really put out much sound other than that when i have music playing. I changed the setup in my trunk (its a 91 civic hatch) so that the sub sits in the floor and the space for the spare tire acts as a box. I mounted the amp next to the sub which turned out to be a bad idea, the sub rattled the amp apart lol (it was also raining and it got a little wet but i couldnt see any moisture inside) and thats when the noise started. So i opened it up and put everything back where it was supposed to go, checked for any spots where it looked like anything might have burned out (everything looked fine) and hooked it back up and it still had the same problem. Any suggestions to help me fix this? (BESIDES TELLING ME TO JUST GET A NEW ONE) all the specs for the amp are at: http://www.epinions.com/specs/Lanzar_125W_x_4_Amplifier_VIBE425__Multi_Channel_Amplifiers_VIBE425