I got a faceplate for my Pioneer DEH4400  radio, so it works
again...but the little speakers in the front doors sound no better
than a cheap transistor radio....bass is non-existent even with the
bass boosted all the way up. Looks like there are also two speakers on
either side of the dash. ANyway I need to upgrade them somehow so I
have decent bass. Doesn't have to be good enough to rattle your
fillings loose, just decent.  I don't want to spend big $$$ for a
sub-woofer in the rear, I think that requires an amp. but is there any
bass speaker I could get and put behind rear seat (its a wagon) that
would mix both channels and just provide bass without an expensive
amplifier? Or can I get better speakers of the same (small) dia. or a
little bogger that DO have decent bass?   Thanks, geronimo