Amazon.com: Pioneer TS-A300D4 12 Inch 1500 Watts Max Power Dual 4-Ohm Voice Coil A Series Car Audio Stereo Subwoofer Loudspeakers / Free Alphasonik Earbuds : Electronics
Rockville RKPUN12D1 - Recone Kit For Punisher 12D1 Subwoofer Do It Yourself Kit - Walmart.com
Amazon.com: Pioneer TSW126M 12" Subwoofer with IMPP Cone : Automotive
Best Buy: Pioneer Champion Series PRO 10" Dual-Voice-Coil 4-Ohm Subwoofer TS-W2502D4
Pioneer TS-W2502D4 Champion Series Pro 10" sub with dual 4-ohm voice coils at Crutchfield
Sub of the Month - Pioneer TS-W3002D4 Champion Series Pro Sub | Fast Car