I have a 94 base model with a 5 speed transmission. I recently installed a 6 disc CD player in the glove box and replaced the rear deck speakers. I noticed that I do NOT have speakers in the rear doors, but there are grills there. With that, my questions are as follows:

1. Has anyone added speakers?
2. What size would it take? I imagine the same as the front.
3. I have read in other posts that some volvo speakers are 4ohm and some are 8ohm. Does this really make a big difference?
4. Do I need to upgrade the radio to do it?


Lots of questions, just hoping someone else out there has tried this.

Thanks