Resonance & Vibration

[Bean]

Is fitted some new front and rear speakers ages go when I bought a new headunit.

My problem is vibration and resonance.

When I turn the volume up and there is a fair bit of bass the door covers shake and vibrate, the rear parcel shelf starts buzzing and I have to turn the volume back down :(

I have fitted some dynomat to the rear shelf and some in the boot but it's made little or no difference.

Any suggestions guys? :confused:

[JackaL]

I had the same problem.

You can cure the shelf by stuffing card under it so it's lifted up a bit, and pressure is put on the clips to stop them rattling.

The fornt doors? I just use a high pass filter at approx 150/200 Htz to cut the bass to the speakers - no problem now. But then I have subs to make up for lost bass!

[Bean]

Cheers, I think I'll try wedging stuff under the parcel shelf.

I haven't filtered the front speakers, can't be arsed.

I think the dynomat stuff I used was their cheapest grade.

[alongwor]

Dynamat will only reduce the amount of flex in the door skin. What you have described is the interior door car vibrating. One possible solution to stop this is to use "dum dum". Its black sticky stuff that is used for sticking the plastic sheeting to door skins. If you place a layer of this between all points where the door card touches the door skin, this should at least reduce if not eradicate the vibration. Hope this helps.

[Amdathlonuk]

Originally posted by BeanS14:
[QB]

I haven't filtered the front speakers, can't be arsed.

QB]

Just put a capacitor on them at about 12p a throw!!

[Bean]

Originally posted by Amdathlonuk:
<STRONG>

Just put a capacitor on them at about 12p a throw!!</STRONG>

I know how to filter them but it still involves removing the door card.

Still can't be arsed :D

[Diddn]

Originally posted by BeanS14:
<STRONG>

I know how to filter them but it still involves removing the door card.

Still can't be arsed :D</STRONG>

you could cap them at the amp side, hence won't need to remove door panels.