The modern stereo system

@Princess Valiant

You should be able to run a pair of 6X9’s in the rear deck easy enough but the front kicker speakers are not really worth it. As RRR said. You would sonically be better off with a larger 6 inch door speaker. Larger if it fits, but not smaller than 6 inches.

I don’t know why you would need two 12’s for bass, but if you think you need it..... the real issue is amplification or at least the power to run the amp(s) needed to run system. Look into alternator & wiring upgrades as any amp your going to be looking at that is worth there salt will require a good bit of power.

For ideas, info and perhaps even selection, stroll through the online catalog @ Crutchfeild to see what they have. Since your going to go down this concert hall approach of sonic bliss, aim high on the quality of the parts. The initial cost may hurt a bit but when your done, you’ll be VERY happy you went the extra mile for years to come.