Summary: The center channel is very important...and this is a good one. I've combined this center channel with the RC80i ceiling speakers for the rear and Tsi 300 for the front satelites (and a 12" sub). This is my first 5.1 set-up so I don't have a lot to compare to. What I can say is that the 5.1 exerience is far supperior to a front only set-up (ok - not a news flash). This center speaker provides a great balance to the rest of the system.
Pros: Price, performance, balance, well matched with other Polk Tsi speakers.
Summary: I bought this to replace the center speaker from a '5 speakers + sub" in-a-box kit. I wasn't able to hear dialogue clearly in movies or TV shows. I can't speak to "tones" or "pitch" or any other such speaker-talk, I just know that I can hear dialogue that I couldn't hear before. Very happy.
Pros: Got a great price from Crutchfield. Fast shipping.
Summary: My Polk TL2 Center was getting the job done but found its sound to be thin matched with Tsi100s so CS10 investment was needed . I went on the hunt finding lowest price with free shipping at Crutchfield. I ordered it on a Tuesday afternoon receiving it the following day which I found amazing , Such online delivery is a purchasers dream come true so I'm very happy will be shopping here again.