Amazon.com: Pioneer 1300 Watt 12 Inch Single 4-Ohm Car Audio Subwoofer, 2 Pack | TS-W126M : Electronics
Argos Product Support for Pioneer TSW311 1000W Subwoofer (548/6447)
Crunch Crw12d4 12 Inch 800 Watt Max 4 Ohm Dual Voice Coil Car Subwoofer Speaker With 2 Channel 1000 Watt Amp A/b Class Car Audio Stereo Amplifier : Target