MartinLogan Dynamo™ 1100X Powered subwoofer, wireless adapter optional at Crutchfield
KEF Wireless Subwoofer Adapter Kit Black KW1TXRX - Best Buy
Amazon.com: Lavales Wireless Audio Transmitter Receiver 2.4Ghz Wireless Adapter Kit for TV to Subwoofer/Powered Speaker/Stereo/Soundbar, 320ft Long Range 20ms Low Lag 192kHz/24bit HiFi Audio : Electronics
Amazon.com: 1Mii 3-in-1 2.4GHz Wireless Audio Transmitter and Receiver for TV, 20ms Ultra Low Delay RCA Out/in, 320 ft Range Wireless Adapter for Subwoofer to TV/PC/CD Player, 2 Receivers for Two Speakers :