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: Earthquake Sound FF6.5 6.5-Inch Front Firing Subwoofer black : Electronics
6.5" (165 mm) Red Carbon Fiber Woofer with Phase Plug