I have the klf-20's and they rock. I love them
for music and movies. I belive that there is a
big difference from the klf-10 to the klf-20.
I know that the klf-30 has a litte more slam than
the klf-20 and using two 12 inch woofers verses the
the 20's using 10 inch woofers also the 30's are
rated at [email protected]@1metter and the 20's are [email protected]@1meter.
I know that there are people at the klipsh forum
that could help you better. but with either speaker
you just going to love. www.klipsch.com
I have a pair of each and here's my impressions: the 10's have very good bass, and good mids/hi's, but they can be overpowered by the 20's/30's. The 20's/30's both play VERY loud & clean. Good bass, mids, & hi's. I've heard that the 30's have more slam, but I have them set to "small" and use a dual 15" sub for the lower end. I have the 30's up front and originally had the 10's as surrounds, but they definitely were being drowned out by the 30's. Now I have the 20's as surrounds and it sounds MUCH better. I will move the 10's to the back surround position soon. I also converted a KLF-10 into a center channel.
Over-all I totally LOVE the KLF series for HT and music. The 20's/30's sound very much alike, but the 10's are also a good speaker, especially if you can get a deal on them.
Here's a link to the Legends in action http://www.geocities.com/mlstrass/myhometheater.html