Hello, Rick! Last year, I replaced the factory speakers on my 2004
Accord EX-L sedan, the two rears with Kicker 3-way 6x9"s and the fronts
with 6" 2-way Kenwoods. I kept the factory radio unit because I didn't
want to lose the functionality of the dash unit itself. I kept the two
factory tweeters in the back of the dashboard because they required too
much labor to change. I had a professional shop do the installations.

I apparently do not get the full range with this set-up. If I adjust
the treble towards maximum, I get harsh feedback anytime the vocals
sing the "s" sound. I can minimize this feedback by neutralizing the
bass and treble settings on the factory unit. I'm not sure if the
factory tweeters are producing this feedback, but the distorted "s" and
"sh" sounds suggest that 2-way 6x9"s in the rear may be the way to go.