I tackled mounting my rear speakers in the rear cover yesterday and this morning.
I bought a cheap pair of 4" Pioneers, as one of my BMW ones was blown anyway.
I needed to fit the speakers from the rear, as I want my upholsterer to cover the fronts and punch holes in the leather. I don't want speaker grilles.
So I cut 4 squares of 5mm ply, two with 100mm holes and two with 96mm holes. I glued one of each together to give me a 10mm thick plate with a 'stepped hole'. I then put PU adhesive around the edge of the smaller hole at the rear and left that to cure.
Then I mounted the speakers onto the set PU adhesive, which effectively rubber mounts them, as PU sets like hard rubber.
The whole lot was then PU glued to the inside of the cover, which also effectively rubber mounts the plates.
I have yet to try them but hopefully vibration and distortion should be significantly reduced than it would have been.




