Amazon.com: H YANKA 12 Inch Subwoofer - 12 Inch Paper Cone Subwoofer Car Audio, Black Aluminum Basket, Dual Voice Coil 2 Ohm Impedance 12 subwoofer, 1800W MAX Power 12 inch Competition Subwoofer : Electronics
Polk Audio db1222 Ported enclosure with two 12" db Series subwoofers at Crutchfield
Titan 12" Subwoofer | Car Audio Equipment | American Bass
Amazon.com: H YANKA 12 Inch Subwoofer - 12 Inch Paper Cone Subwoofer Car Audio, Black Aluminum Basket, Dual Voice Coil 2 Ohm Impedance 12 subwoofer, 1800W MAX Power 12 inch Competition Subwoofer : Electronics