The ALTEA-718A is a self-powered subwoofer system designed to provide extended bass response for wide-range ALTEA systems. At the heart of the system is a DAS 18FW4 woofer. This speaker incorporates a high efficiency design using FEM analysis and a 3″ voice coil for long excursion. Details: Self-powered bass systemLightweight Class D amplifier with SMPS18″ high efficiency speakerDAScontol™ interface for easy mounting and adjustment24-bit DSP with LCD displayIntegrated rigging points and mast socket Electronics and Connectors Nominal Amplifier Power (continuous) 600 W Nominal Amplifier Power (peak) 1200 W Input Type Balanced Input Impeadance 20 kohms Input Sensitivity 1.95 V (+8 dBu) Audio Signal Input Connector 2 x Female XLR Audio Signal Loop Thru Connector 2 x Male XLR Control DAScontrol™ Current Draw 230 V / 115 V 1.4 A/2.8 A