When you play some good tube with lots of bass, you might have some annoying vibration on the back of the car, here is a simlpe DIY to fix this.
1. removing the sub: Remove the lead (you don’t have to do this but the sub is heavy so make sure you’ve got hold of it when you remove it or it will pull on the connecter as it drops). Remove the 4 bolts with an 8mm socket, pop a screw driver in between the sub and bulkhead to “pop” the white studs. (insert the screwdriver under the lug next to the white stud so you don’t damage the foam)
2. this is what you’re left with, the first ball needs to go behind that centre strut
3. view from side on, you can see the centre tennis ball here:
4. you can see the ball i’ve inserted into the right hand recess here. both my left and right balls sit just at the corner of the speakers I’m sure you’ll get the same results wherever they are but they slotted in nicely in the ridge that runs along the parcel shelf.
Then just put the sub back on. There are 2 plastic retaining lugs towards the back that you insert, pop the white studs back in and then replace the bolts.
This really is a simple and cheap mod and shouldn’t take more than 10 minutes. The improvement to mine is unbelievable. No more having to turn the base right down on some tracks (although my hand still instinctively goes to turn it down!!).
The base setting now sits 1 click below centre on mine and I don’t have to touch it.
Full link: http://www.mtorque.co.uk/ubbthreads/ubbthreads.php?ubb=showflat&Number=494130&fpart=1