QUOTE (neilo63)
i was thinking of an all pioneer set up with 3 way rounds in the front doors and 6x9 in the rear with a 4ch amp. would people reccomend 6x9's in terms of sound quality. :?
as for any speaker/sub purchase, audition them first to ensure they sound nice to you. also compare them to as many others as possible, including those cheaper and dearer.
as for pioneer, they make some good value stuff. i particularly like their aramid cone range. not sure what you had in mind.
for SQ though, you will probably find a lot of alterntives that are worth auditioning, depending upon your budget.
coaxials or 'tri-axials' are typically a compromise in quality. pioneer won't offer anything special, but some brands offer a very high quality woofer/tweet combo with external passive xovers. for the front speakers, i usually suggest going with splits/components. this will allow independent mounting of the tweeter for better imaging/soundstaging if you can angle and position it optimally. coax's tend to fire straight across from the doors at a low height, if not into your ankles, so the high-range frequencies will sound like they are coming from down there rather than up high where it is preferable (more lifelike).
consider a 10" sub suited to small sealed boxes. they can suit boxes as small as 0.5~0.7cuft which is quite small and wouldn't consume much boot space.
if not, then sure, something like 6x9s may be an option.