Amazon.com: Hifonics THW12D4 Zeus Theta Series 1000 Watt Max 500 Watt RMS 4 Ohm 12 Inch Car Audio Subwoofer with 2.5 Inch Dual Voice Coils, Black : Electronics
Amazon.com: NVX VSW104V2 10" 500 watt RMS 1000 watt Peak Dual 4-ohm Professional Grade VS-Series Car Subwoofer : Electronics
Amazon.com: Infinity - Two KAPPA 12" (300mm) 500 Watt RMS, High-Performance Subwoofers, Switchable 2 OR 4 OHM : Electronics
Amazon.com: Pyle 8 Inch Car PA Woofer - 500 Watt High Powered Car Audio Sound Component Speaker System w/ 1.5" Kapton Voice Coil, 55-6 kHz Frequency, 89.2 dB, 8 Ohm, 40 oz Magnet - PylePro PPA8 , Black : Electronics
Amazon.com: American Bass DX-15 4 Ohm, 500 Watt RMS / 1000 Watt Max Power, 15 Inch Subwoofer, 125 oz Magnet, Single, Hi-Temp 4-Layer Voice Coil, Black Powder Coated,Non-Pressed Paper Cone : Electronics
Amazon.com: Massive Audio GTX64 – 6.5 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 6.5" Subwoofer 250 Watt RMS, 500w MAX Dual 4 Ohm, 1.5 Inch Voice Coil. Sold Individually : Electronics
Amazon.com: Sundown Audio Pair of E-12 V.3 D4 12" 500W RMS Dual 4-Ohm EV.3 Series Subwoofers : Electronics
Amazon.com: American Bass XD-1244 12-inch Subwoofer 500 Watt RMS / 1000 Watt Max Dual Voice Coil 4 Ohm Voice Coils 125 Oz Magnet : Musical Instruments