Amazon.com: ALPHASONIK APP122 Complete 1500 Watts Dual 12" Subwoofers Car Bass Package with Amplifier and Installation Kit Included - 2 Sub Woofers with Grills in Custom Ported Box Loaded Enclosure, Black : Electronics
The Workhorse Passive GRS 8" Mini Subwoofer Kit
Amazon.com: PRORECK PR-122M Complete 1500W Dual 12" Car Subwoofer, Includes Loaded Enclosure with Mono Block Amplifier,Wiring Installation Kit : Electronics
Amazon.com: BELVA BPKG210v2 1000W Dual 10" Car Subwoofer with Ported Enclosure, Monoblock Amplifier, Wiring Kit and Remote Bass Knob : Electronics