Weird Speaker Distortion

[naboo]

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

[doyl]

Quick diagnostic.

Take the speaker out of it's mount and see if it still happens.

[Carbon 34]

mine had the same problems due to the baby bolts and trained muppets who installed them for compliancing.

dumb ADR rules, i'd like to see you get three babies in the back of my gtt with the seat all the way back... even 1 wouldnt fit without kicking me in the ear...lol end rant ...lol

remove the grills and bolts/bracket if its a r34 and see if that fixes it. if so then you either need to break the adr rules and bin them. out. or mod the grills to not distort the speaker frames.

you need 3 per ADR rules , not responsable if you remove them !!!

record the sound with video if you can?