Amazon.com: Car Vehicle Subwoofer Audio Speaker - 6 Inch Competition Grade Pressed Paper Cone, 4 Ohm Impedance, Advanced Air Flow, 400W Power for Stereo Sound System - Audiotek K706 (1 Subwoofer) PK1 : Electronics
Tang Band W6-1139SIF 6-1/2" Paper Cone Subwoofer Speaker