It's not so much that. Klipsch is known for being brighter sounding than other speakers. Some folks love them. I'm more leery about their sunwoofers. From what I've been reading, some of their new offerings are decent, but I had a pair and they just don't compare to some of the id brands out now like SVS, Hsu, Rhythmik, etc.
I had a
pair of RPW 10's and replaced them with
2 SVS SB1000's and I was completely blown away. The sound quality of my entire system improved just swapping my subs for better ones.