Amazon.com: Pyle 6.5 Inch Mid Bass Woofer Sound Speaker System - Pro Loud Range Audio 300 Watt Peak Power w/ 4 Ohm Impedance and 60-20KHz Frequency Response for Car Component Stereo PLG64,Yellow : Electronics
Amazon.com: Pyramid 6" Car Audio Speaker Subwoofer - 300 Watt High Power Bass Surround Sound Stereo Subwoofer Speaker System w/ Molded P.P. Cone, 86 dB, 4Ohm, 40 oz Magnet,1 inch KAPTON Voice
BOSS Audio Systems CXX8 Chaos Exxtreme Series 8 Inch Car Audio Subwoofer - 600 Watts Max, Single 4 Ohm Voice Coil, Sold Individually, For Truck, Boxes and Enclosures, Use With Amplifier
10 Inch Car Subwoofer Speaker - 300 Watt High Powered Car Audio Sound Compone... | eBay
Pyramid PW677X 6 Inch 300 Watt 4 Ohm Car Audio Power Audio Sub Subwoofer Woofer - Walmart.com
Pyle Gear PLG64 6.5 Inch 300 W Car Audio Midrange Subwoofer Auto Speaker 68888876261 | eBay
BOSS Audio Systems P55.4C Phantom Series 5.25 Inch Car Stereo Door Speakers - 300 Watts Max, 4 Way, Full Range Audio, Tweeters, Coaxial, Sold in Pairs, Hook Up To Amplifier