Just finished my install, and I'm not sure whether to be proud or disappointed. With the gains set at half or even 3/4 and the volume at 25/30 you can only tell the subs are moving by touching them, and they don't put out much bass. Barely outdoes my factory infinity 6x9's. With the gain turned all the way up they move about an 8th of an inch, and shake my rearview somewhat well.
I grounded where the seat connects to the chassis since it was the only place i could find anywhere near my amp, im not sure if thatll be the problem or not.
Anyways, with a dmm i get 13.8 volts at the battery and amp, so voltage shouldn't be a problem. I'm reading 0.95 ohms at my terminals.
I'll go ahead and say my box is sh*t, isn't sealed that well and i made one of the cutouts too large so one sub is only supported on one side, the other side just rests on the edge. The other sub fits perfectly, I'm going to be buying a new box from a custom builder in a couple months.
So are my subs stiff, or is this just how they'll preform?