Crunch 8" Downfire Slim Car Audio Bass Box reflex System 20cm Shallow Subwoofer | eBay
RW10D4 Echo Series 10 Inch 500 Watts Power Dual 4 Ohm Voice Coil, 2" Black-Coated 4 Layer High Temperature Voice Coil, Competition Grade Pressed Paper Cone, Car Audio Subwoofer - Recoil Audio
Amazon.com: MB Quart DS1-204 Discus Shallow Mount Subwoofer (Black) – 8 Inch Subwoofer, 400 Watt, Car Audio, 2 Inch Voice Coils, UV Rubber Surround, Best in Sealed Enclosures : Electronics