Quote Originally Posted by moonthink View Post
So I finally opened up the sub last night and made sure none of the wires and insulation was going to come in contact with the driver. The previous owner had opened it up to take pictures of the insides for the ad. I don't think they were careful to put the driver back in the same orientation. The driver has +/- wires going to one side for the speaker, and +/- to the other side for the servo. I re-oriented the speaker so that wires were on either sides (9:00 and 3:00), which seemed to most logical solution. It had been at like 1:00 and 7:00 when I removed it. I also found a screw to fill in for the missing one.

I only had one night listening to it so far, but it seems to have solved the issue (which only occurred sometimes, but more often lately). Thanks everyone for the advice!
so far so good. Fingers crossed!