Amazon.com: BIC America WTR-Sys Wireless Transmitter/Receiver Kit for Hookup of Wireless Subwoofers and Wireless Powered Speakers, 8.30in. x 8.30in. x 2.20in. : Everything Else
BIC America WTR-Sys Wireless Transmitter/Receiver Kit for Hookup of Wireless Subwoofers, 8.30in. x 8.30in. x 2.20in. & BIC America W-Receiver Add-on W-Receiver for Wireless Subwoofers - Walmart.com
Polk Audio PWSK-1 Wireless audio kit for select Polk subwoofers at Crutchfield