12" 30cm Sub Subwoofer Bass Car Audio 7000W 4 Ohm DVC SPL SQL Competition Bass | eBay
Amazon.com: Lanzar 6.5” Car Subwoofer Speaker - Black Non-Pressed Paper Cone, Aluminum Voice Coil, 4 Ohm Impedance, 600 Watt Power and Foam Edge Suspension for Vehicle Audio Stereo Sound System - MAXP64 : Electronics
Amazon.com: Pyramid 6" Car Audio Speaker Subwoofer - 300 Watt High Power Bass Surround Sound Stereo Subwoofer Speaker System w/ Molded P.P. Cone, 86 dB, 4Ohm, 40 oz Magnet,1 inch KAPTON Voice
MESO-6-5 - 800 Watt 6.5 Inch Car Subwoofer - CT Sounds – CT SOUNDS
HIFONICS 12 in. 800-Watt 4-Ohm DVC Car Audio Subwoofer Power Bass Sub (6-Pack) 6 x HFX12D4 - The Home Depot