klipsch R-120SW Subwoofer connection to Old Audio Video Receiver VSX-D81OS | AVForums
Klipsch Reference R-121SW 12” Front-Firing Subwoofer | Snap One
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My system was purchased in 2012 and I have a SW-110. I just upgraded my AVI and would like to add an additional sub. I've contacted Klipsch and they advised getting the