I wanted to keep the stock head unit, as I feel that the factory radio has a lower theft attraction level than an aftermarket unit. However with the top down, once speed exceeds 30 mph, the factory radio just disappears. So I decided to try the Clearwater units in conjunction with the Clearwater amp.
Installation was a snap. (I had the factory speakers, so the wiring was in place) Total time, less than 5 minutes in the parking lot at work. They sound a lot better than stock.
Went in that evening. taking the door panels off was a little tricky at first, but I spent $3.95 at Pep Boys for the tool to remove the window cranks. That makes the job much easier. Sound was much clearer, but not enough volume until I installed the Clearwater Amp. With the amp, and the speakers combined, I took the car out to to the interstate, and with speeds well in excess of the posted limits, roof down, I could clearly here piano pieces.