Skar Audio EVL-65 D4 6.5" 400 Watt Max Power Dual 4 Ohm Car Subwoofer : Amazon.ca: Electronics
2 HD-6MSUB CDT AUDIO 6.5" CAR 4 OHM 80W RMS MIDS SUBS DRIVERS 6 1/2" PAIR NEW 93207310690 | eBay
Car Audio Guide: Speakers, Amps & Subs Explained | Fast Car
Car Subwoofers & Accessories
PYLE Single Voice Coil Car Subwoofer - 8 Inches, 200 Watts at 4-Ohm Car Audio Powered Subwoofer, Injection Cone with Rubber Edge, High-Powered Car Subwoofer, Audio - PLMW83, Black : Amazon.ca: Electronics
Helix 350 watts 10" Car Subwoofer (P 10w) - 10" Subwoofers - East Hamilton Radio