My rear speakers (3 months old) are distorting/cracking constantly. Its hard to describe, but basically even at barely audible volume levels, the bass line in any track will just be a series of crackles. Mids/higher range don't crackle as much, but still sound pretty bad. I initially thought dodgy head unit, so swapped this out, this didn't work, so ran a new wire directly to the speakers from the head unit, still crackly, so I tried plugging in a different speaker, and it seemed fine.
Although the obvious problem seems to be dodgy speakers, I just thought I'd ask here before buying some new ones...again. They're only new, and Polk, so I would have thought it pretty unlikely to have any problems, and with both at the same time.
Is it possible that the child-seat mounting bolt & hardware, that's drilled through the speaker grille, is causing problems? I wasnt sure if it may have been pushing down on the cones, but loosening off the bolts and moving the mounts around didn't seem to make a difference. Anybody know of something else to check, or have any other ideas?
Cheers