The 3,000-Watt iQ18B is a front loaded 18" powered subwoofer ideally suited for a wide range of portable and fixed installation, music and speech sound reinforcement applications. The high excursion 18" low frequency driver with double suspension low mass 4" voice coil provides fast and accurate transient response for virtually distortion-free operation ? even in the most demanding performances. Equipped with a very efficient and lightweight KLARK TEKNIK Class-D power amplifier, the iQ18B provides an impressive 3,000 Watts of output power. A high degree of control over the loudspeaker system?s performance is managed by a sophisticated, but easy to use KLARK TEKNIK Digital Signal Processor (DSP), which provides dynamic EQ and transparent limiting for the utmost punch and definition at high output levels ? and long-term reliability. iQ18B?s advanced DSP speaker modelling presets include detailed and accurate models of some of the audio industry?s most-respected speaker systems.