6.5 Inch Car Subwoofer Speaker Black Non-Pressed Paper Cone 4 Ohm Impedance | eBay
Mc Gee PA Subwoofer 165mm 6.5" 60W RMS 8Ω Weight 1.12kg 80-5000Hz 070013 4250019105197 | eBay
DC Audio Level M3 6 6" 300w Subwoofer - SSA STORE
NVX 250W RMS 8" Dual 4-ohm Car Subwoofer - SSA STORE
Amazon.com: 10-Inch Low-Profile Amplified Subwoofer System - 900 Watt Compact Enclosed Active Underseat Car Audio Subwoofer with Built in Amp, Powered Car Subwoofer w/Low & High Level Inputs - SBA10A : Electronics
Amazon.com: HERTZ Mille Pro Series MP-300-D23 12 in. (300mm) 600 Watt RMS 2-Ohm DVC Subwoofer : Electronics
Amazon.com: HERTZ Mille Legend Series ML-20003 8 inch (200mm) 700 Watt RMS Subwoofer 4-Ohm SVC with Neodymium Magnet : Electronics
Q POWER Dual 15 in. Vented Subwoofer Box 2 Speakers Enclosure (2-Pack) 2 x QBASS15 - The Home Depot