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 SKW-204 Woofer, 230 W RMS - Walmart.com
Onkyo Subwoofer Speaker - electronics - by owner - sale - craigslist