BOSS Audio Systems B12ES 12 Inch Powered Car Subwoofer – 1200 Watts Max, Single 4 Ohm Voice Coil, Built-in Amp Package, Remote Subwoofer Control (16 ft Cable), Sold Individually
JBL Stage 800BA Slot-Port Enclosure - Active Car Subwoofer with built in Harman Kardon Class D amplifier with 100 Watt RMS and 8" JBL Sub Woofer : Amazon.co.uk: Electronics & Photo
JBL Stage 800BA 8" Active Subwoofers Enclosure
Amazon.com: Xtenzi Amplifier Bass Volume Knob Control Remote XTBR5-BL Compatible with Select Infinity JBL RBC BassPro : Electronics