Universal Car Stereo Rearfire Sealed Dual 12" Alpine S-W12D2 Type S Car Audio Subwoofers Custom Sub Box Enclosure Package New : Electronics - Amazon.com
Alpine Bundle Compatible with Universal Car S-W10D4 10" Subwoofer Dual 4 Ohm with S-A60M Class D Subwoofer 1200W Amplifier, and HA-AK4 Amplifier Install Kit : Electronics - Amazon.com
Amazon.com: Alpine Type R 12 Inch 2250 Watt Max 4 Ohm Round Car Audio Subwoofer %7C R%2DW12D4 : Electronics