I replaced the rear speakers in my car with Pioneer p/n 130tsa5715 speakers from Crutchfield. I think they are 5x7. They really made the ASI sound much better, the origional speakers were stiff and sounded awfull. The fronts are now Pioneer p/n 130ts879 3-1/2 2- way and were bolt-in. The rears took a little pushing to fit but the hardest part was removing the rear trim to get to them. Use a heat gun and puttyknife, go slowly and patiently so as not to rip the vinyl. The origional radios can't power a sub-woofer so at that point you are also changing the radio unless you add an amplifier. I have seen some installations where a panel was fabricated to go below the rear window behind the seat and the speakers were installed in it. With the right carpeting covering it it looks factory but you give up some valuable room on the rear shelf. The compartment behind the driver's seat (the "vault") makes a good place for the c/d changer if you can give that up.(Keep it removable in case you need to get to the lambda computer). David Teitelbaum vin 10757 --- In dmcnews@xxxx, Delorean17@xxxx wrote: > Hello, > I am in the process of replacing all the speakers in my car. The other > ones are rotted out. I would prefer not to use 4x10 speakers in the rear > again