Cerwin-Vega! WOFP18406 18" Stroker Woofer 8ohms from the AB-36C Folded Horn Subwoofer | Reverb
Amazon.com: Cerwin-Vega Home Audio CVI-218S 18" 2400W Max Passive Subwoofer with 2 High Power Cast Frame Transducers Black Home Theater System : Musical Instruments