REL Gibraltar G1 12" Powered Subwoofer; Piano Black; G-1 (Serviced and Updated) - The Music Room
Amazon.com: REL Acoustics Airship™ Wireless Subwoofer Transmitter Created for 212/SX, S/510 and S/812. Compatible with G1 Mark II. Not Compatible Serie T/i, Serie HT, Legacy Serie S or No.25. : Electronics