Amazon.com: Gravity Car Vehicle Subwoofer Audio Speaker - 12 Inch Competition Grade Pressed Paper Cone, 2 Ohm DVC, Advanced Air Flow, 6000W Power for Stereo Sound System Warzone GW12D2 (2 Subwoofers) : Electronics
BOA151 - 15" 6,000w Dual 1 Ohm BOA Series Mega Subwoofer by Massive Audio® - SSA STORE
Massive Audio HIPPOXL122R 6000W Max (3000W RMS) 12" Hippo XL