Tang Band W5-1138SMF 5-1/4" Paper Cone Subwoofer Speaker
Amazon.com: DS18 SLC10S Car Subwoofer Audio Speaker - 10" in. Paper Glass Fiber Cone, Black Steel Basket, Single Voice Coil 4 Ohm Impedance, 440W MAX Power and Foam Surround for Vehicle Stereo
SLD-Series SD-2 10" 600W Shallow Mount Subwoofer – Sundown Audio