Thanks for the response. These numbers don't exactly jive with the 2000 parts list Klipsch used to have on their website. The KSF-C% usesa a K1053SV woofer which may be the same as the K1053S now. The K1026S is a 6" woofer. The K1073K is a 10" massive sub. The KSW 10 uses a K1070K woofer according to the 2000 list. Maybe the numbers have changed. I have a change to purchase some of these and thought I'd get the specs before I decided. Thanks.