JBL Stage 1010 Subwoofer | 10" (250mm) woofer with 225 RMS and 900W peak power handling.
Dual JBL Club 1024 Subwoofer in L-Ported Box BASS TEST - YouTube
Amazon.com: JBL BassPro SL2 Active Underseat Car Subwoofer with Built in Amplifier - Under Seat 8'' Subwoofer Car with 125 Watt Power Amplifier : Electronics