Hello I'm new to the forum and happy to be a part of it! I have a pair of Klipsch KW-120 THX subwoofers without the amp. Is it worth buying the amp or should I sell them and buy a powered Sub. I currently have a Pb4000 pro and the THX ultra 2 series as my front stage. Anyone have experience with the THX subs? Or can I run them with another type amplifier? I may be interested in selling them if the price is right. Im in the Tampa bay area in Florida. Please let me know what you think.