Powered subwoofer system Lightweight Class D amplifier High efficiency 18 loudspeaker DAS control for easy setup and adjustment 24-bit high-end DSP with LCD screen Integrated rigging points and pole mount socket The Altea-718A is a powered subwoofer system designed to provide extended bass response for the Altea full-range cabinets. At the heart of the system is a DAS 18FW4 bass loudspeaker. This loudspeaker incorporates a FEM optimized high-efficiency speaker design and an extended 3 voice coil for long excursion. Cooling is assured thanks to the 18FW4's vented pole piece and abundant apertures in the speaker's back plate keeping power compression to a minimum while providing high acoustic output over extended periods. Driving the DAS 18FW4 loudspeaker is a cutting-edge 1200 peak Class D amplifier. On the rear panel a balanced input connector and stereo loop thru output connections are available to provide signal for Altea satellite systems. Thanks to the digital presets accessible by way of a DAS control interface on the rear of the cabinet; setting up a combo system with Altea full-range systems is easy. The Altea-718 is the passive version for use with external amplification and outboard DSP.