Do yourself a favor, don't try to make it better. Make it gone and put in a better systm. The door speakers are crap and the door panel covers the top thrid of the speaker so even a good speaker won't sound much better. The rear sides are 6.5 crap but the opneings a 4.5, go figure. The mid-bass (not subs) are 6.5 paper donkeys as well. What passes for an amp in the rear is Malaysian junk and the head unit is marginal at best. By the way 200W right, how bout80 at 12V, the unit has to be at 16.2V to hit 200 and then with a bad distortion level. It's a shame that such a nice interior has such a crummy audio system. Oh and the tweeters should be mounted with the door speakers to keep the phase shift right, not four feet away on top of the dash.