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 : Electronics
Amazon.com: Skar Audio DDX-15 D4 15" 1500 Watt Max Power Dual 4 Ohm Car Subwoofer : Electronics
Alphasonik PSW215EU, 38cm (12") Alpha 200 Series Subwoofer, 500W RMS