Amazon.com: Turbo Sound 18-in High Power Multi function Powered Subwoofer with Phase Reversal Switch XRL Inputs and Outputs Large 2500W Powered Sub, 180 degree Phase Reversal Switch DEEJAY LED TBHEVM18PSUB : Electronics
Turbosound MS218 Manchester Series Passive 8000W Dual 18" MS218
Turbosound NuQ118B-WH 18" Bandpass Subwoofer For Portable PA Applications, White | Full Compass Systems