"For this review, we used the Klipsch Quintet III with a Sub-12, and
while it's a superb subwoofer, we had to invest an hour or so
fine-tuning the sound to get the satellite and subwoofer to blend just
right. Our Denon AVR-2807's
bass management had to be set to a rather high crossover point (150Hz)
to minimize the bass gap between the teensy sats and the humongous sub.
Positioning the sub within a few feet of the front satellites also
helped in that regard. In the end, we were reasonably happy with the
matchup, but it wasn't perfect; as we played CDs and DVDs, there were
times when the subwoofer or the satellites had too much or too little
bass. In those cases, we adjusted the subwoofer volume to sound right
with the disc."
A better matchup might be with the SUB 10 unit. The larger sub and the high crossover point might be what lead to the need for constant adjustment, it normally should not be necessary except in extreme situations.
I think 150Hz is compromising localization too much, I'm always in favor of setting the crossover at 80, or about 10 Hz above the lowest -3db down point of your setup. Accordingly, I will append my eariler post to 120 Hz +/- based on room acoustics and sub utilized. This is similar to Dtel's post above.
*sigh* Note to Self: why can't Klipsch just put some information like this in the OWNER"S MANUAL?? Quintets are generally a user's first experience with home theatre, instructions need to be clear and easily understood by novice HT lovers.