I also decided when sitting in front of the idiot box (watching motor racing) that I would mutilate the door pockets and recover as I have some leftover black carpet.
As you know (or can see in the picture below) there are cut outs for speaker holes.
Do you think that this will have a huge bearing on the sound quality/noise level?
Notes...
- The system will not be a full feature of this car and so comp spec sound is not the objective.
- If you require more info to make a comment all the speakers are all Clarion. The plan is to have a pair of 6x9's on the rear parcel shelf the pair of 6" in the doors (1 per door) and a pair of tweeters somewhere (my guess will be the dash or the top of the door skin somewhere - an expert i know will assit with this bit), currently there is no head unit.

Cheers.