well, i own a pioneer 10" sub with a bazoka amp, it worked fine for about 15 months. the sub has a few cracks on it, all from impacts. Recently, all the sub does now is emit a continuois rumble, with varying amounts of bass coming out of it as soon as i plug it into the amp. I dont think the sub is blown, i have it on -5 on the bass control, and i dont listen to bassy music, maybe its the amp? im not sure, any help would be appreciated!