NEW pair 8" inch upgrade Subwoofers for Bose 301 speaker bass woofer 4 ohm 350w | eBay
Amazon.com: Pyle Car Subwoofer Audio Speaker - 8in Non-Pressed Paper Cone, Black Plastic Basket, Dual Voice Coil 4 Ohm Impedance, 800 Watt Power and Foam Surround for Vehicle Stereo Sound System -
8" RI Audio Subwoofer 1000W Peak Power Dual 4 Ohm Energy Series Single – Robidoux Inc
Amazon.com: Audiopipe TXX-BDC4-8 8 Inch 1000 Watt High Performance Powerful 4 Ohm DVC Vehicle Car Sub Audio Subwoofer Speaker System, Black : Electronics