Amazon.com: Pyle 12' Car Audio Speaker Subwoofer - 1600 Watt High Power Bass Surround Sound Stereo Subwoofer Speaker System - Non Press Paper Cone, 90 dB, 40 Ohm, 60 oz Magnet, 2
Pyle PLG64 6.5" 300W Car Mid Bass Woofer Midrange Sub Power Speaker, Yellow - Walmart.com
Big Woofers Give Better Bass – Maybe. | News & Views | Ohm Speakers | Custom Audiophile Speakers for Music & Home Theater
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