Power 12" T1 4-Ohm DVC Subwoofer | Rockford Fosgate ®
OZONE-10 - 1600W Max 10 Inch SPL Car Subwoofer - CT Sounds
Dayton Audio Dcs165-4 6-1/2" Classic Subwoofer 4 Ohm for sale online | eBay
Abaca Audio 4 Inch High-End Shielded Woofer 4 ohm: perfect for replacing/upgrading or building bookshelf, surround, sound bar speakers, or other diy speaker projects.
JBL GX Series 12" Single-Voice-Coil 4-Ohm Subwoofer Black GX1200 - Best Buy
OZONE-10 - 1600W Max 10 Inch SPL Car Subwoofer - CT Sounds
Polk Audio MW5530 Woofers 5 1/4" - 4 ohms - New - Pair | Mavin the Webstore