[Shotimes] Speakers 89

[Techpriest]

The deck was almost dead in my 89 SHO so I replaced it with a Sony CD
player.  After the deck was installed I tired it out and it is LOUD!  That
factory amp really puts out some power.  I don't see me entering any
contests with it, but I also don't see me ever riding in the car, even with
windows down, with the stereo at full.  Since it works so well, I would like
to keep the factory amp.

So now my stereo is good and loud, but not as clear as it should be so I
want to replace the speakers.  Looking the car up at the various car-stereo
sites I keep finding "6x8 in back deck" which I know is not the whole truth.
The car has a pair of 6x8 woofers for low ranges, and another speaker for
mids and highs in the back.  Nobody mentions the other speakers.  Can
somebody tell me what sizes the speakers are and what the function of them
is?  I may have to buy 3 way speakers and remove the unwanted channels
myself, but that is not a problem.  I just want to get a list of speakers
before I go shopping so I only have to remove the speakers once, not once to
measure and once to install.

Thanks, and Merry Chrsitmas!