I currently have 3 4x6 speakers.I also have a really powerful sub,when I turn it up I can't hear the high's or mids.What tweeters would be good?And should I get an amplifier for the front speakers,or a crossover?
honestly, you should scrap the front stage entirely, forget 4x6 speakers, and put some good 6.5" separates in the front doors. Then add an amplifier to drive them, around 50-75 watts x 4 if you want to power the rears too.
lower front part of the door if I recall, usually built out the door a bit to give more depth. I put a hole in the door jamb and the door and put in a grommet with a wiring duct. that allowed me to run quite a bit through the doors.