Turbosound iQ18B 3000W 18" Active Subwoofer 

•Front loaded powered subwoofer for portable PA and installation applications.
•3000-Watt power featuring Klark Teknik Class-D technology.
•Klark Teknik Digital Signal Processing for total system control.
•Speaker modelling includes accurate models of industry standard speakers.
•ULTRANET digital audio networking connects to mixers and other sources.
•High excursion 18" low frequency driver with 4" voice coil and double suspension