Kenwood KFC-W120SVC 12” Subwoofer 1000W Peak 4 Ohm Single Voice Coil

PowerBass S-1204D - 12" Dual 4-Ohm Subwoofer

Planet Audio PL12S 12” 1000 W Car Subwoofer - 4 Ohm Single Voice Coil (single)

Powerbass PS-12 Stamped Steel Basket 10" 250W-RMS 500W-MAX Single 4-Ohm Woofer

PowerBass S-1004D - 10" Dual 4-Ohm Subwoofer

Audiotek 1500 Watt 12" Professional Car Subwoofer 4 OHM AT-12PRO

Audiobank 12 Inch 2500 Watt Car Audio Subwoofer w/ 4 Ohm DVC Power 12' Sub X1

Kicker Comp 12” Subwoofer 4 Ohm 10C124 Tested Works