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
Pioneer Dual 12-Inch Ported Enclosure Powered Subwoofer in the Mobile Audio department at Lowes.com
Pioneer® TS-SW2502S4 - ib-Flat Series 10" 1200W 4 Ohm Shallow Mount DVC Subwoofer
Pioneer TS-SW2501S4 10” 1200W Single 4Ohm Shallow Mount Car Audio Subwoofer Sub | Audio Savings
Pioneer TS-W260D4 10" 1200W Dual 4 Ohm Car Subwoofer + Vented Sub Enclosure Box - Rockville Audio