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. : Electronics
Jamo | WA-2 Wireless Subwoofer Electronics Kit
Polk Audio PWSK-1 Wireless audio kit for select Polk subwoofers at Crutchfield