Amazon.com: 5 CORE 12" inch Full Range Subwoofer Car Audio Dual Cone Speakers Give High Powered Sound Quality, 23 oz Heavy Bass Premium DJ Subs RMS 75W Peak 1200W, 8 Ohms Woofer
Axton ATW16 16 CM Subwoofer 2 x 2 Ohm 75 Watt RMS Subwooferchassis | eBay
Polk Db572 5x7 Inch 225 Watt Max 75 Watt Rms 2-way Full Range Car Audio Marine Vesssel Boat Coaxial Stereo Audio Speakers, Black : Target