you can see here that i upgraded a little bit from the originals.

they are JBL GTO series 4" with a JBL GTO series 1" tweeter.

the speakers a quite deep and almost touch the panel metal, about 3/4" room behind them. the tweeters are just run through small plug holes. they make the tweeters with pop in mounts. the tweeters also have a inline crossover.

wanting to keep original look, i through the MP3 player into the glove box

sound is great.