I was able to get a real nice pair of Infinity Kappas, sized 6x9, for a good price and was wondering if there was any way to fit them in, say, the front doors of the p5? I know those speakers are 5x7, right?

 

I mounted mine in the rear deck. After all my equipment was installed, I had a very big hole in which the sound was horrible. I installed a pair of Alpine 6*9's in the rear deck. I can still remove the deck if I want with a quick disconnect. I am building a fiberglass cover for the bottem to conseal the speakers. This made a world of difference in my car. The sound is rich and clear comming off of my rear window.