Amazon.com: 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: PRV AUDIO 6MB200 v2 6.5 Inch Speakers Midbass Woofer 8 Ohm, 100 Watts RMS, 200 Watts Program Power, 93.5 dB 1.5 in Voice Coil for Small Custom Enclosures Pro Car Audio System (Single) : Musical Instruments
Amazon.com: BOSS Audio CXX124DVC 12 Inch Car Subwoofer - 1200 Watts Maximum Power, Dual 4 Ohm Voice Coil, Sold Individually : Electronics