speaker rattle or vibration

[wunderman]

put a15 into a ported bass cabinet at medium volume speaker rattles or distorts. I insulated this cabinet with thick house insulation on 5 sides is this too much insulation , also when mounting speaker outside -in there was no insulating material around the edge on back side o speaker where it meets the front of the cabinet could this be my problem? THANKS STEVE

[boynamedsuse]

You may need to add bracing inside the cab. IMO you may have more insulation than you need, but probably not too much.

[wunderman]

i found 2 loose screws tightend them down and I put a small ring of cork between back of speaker and on top of the wood then tightend speaker down . it sounds great.