Onkyo SKW-200 Powered SubWoofer 8" Bass Reflex For Home Theatre & Stereo, Tested | eBay
ONKYO SKW-360 Subwoofer Black | eBay
Amazon.com: Klipsch Reference Premiere RP-8000F II 2.1 Premium Home Theater Speaker System with one SPL 15-inch subwoofer in Ebony with Onkyo TX-NR6100 7.2 Channel THX Certified Network AV Receiver : Electronics
Onkyo Powered Active Subwoofer 10" Woofer for Sale in Mount Prospect, IL - OfferUp