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: Rockville RVP12W8 1200w 12" Pro Subwoofers 8 Ohm Raw Sub Woofers 40 Oz Magnets : Electronics
Amazon.com: 5 CORE 15" inch Subwoofer Replacement Speaker 8ohm 2200 W Sub Woofer PA System Raw DJ Speakers Subs Full Range Loud Aluminum Frame 15-185 12 AL : Electronics