Legendary EV sound and performanceInside each low-profile, tour-grade wood enclosure are a range of unique new features that set ETX Powered Loudspeakers apart, combining intelligent technology and innovative industrial design for spectacular results across all applications. EV-engineered high-efficiency transducers and high-powered Class-D amplifiers, Signal Synchronized Transducers (SST) waveguide design and smart FIR-Drive DSP all work together to provide peerless EV sound quality and precise coverage at the highest SPLs.18-inch DVX woofer for extended low-frequency response1800 W Class-D power amplifier with integrated FIR-Drive DSP135 dB peak SPLSingle-knob DSP includes presets for multiple configurations and top+sub combinations (performance style, locations, and space)Special DSP preset for true cardioid performance across the full operating bandwidthLoudspeaker system performance monitoring via integrated LCD and front panel LEDCombo pole cup (insert and threaded) for use with the ETX Powered Loudspeaker two-way modelsEnclosure includes removable castersTrue cardioid DSP preset delivers true cardioid response across all frequencies. The DSP (Digital Signal Processing) menus offer extensive configurations, crossovers, true cardioid presets, protection limiters, EQ mode, and a lock out mode that prevents casual changes to the system. Loudspeaker system performance is optimized via an LCD screen.The enclosure is constructed out of 18-mm, 13-ply birch plywood finished with EVCoat. Also includes professional-grade castors, and combination pole mount receptacle for threaded and unthreaded loudspeaker poles.Get your Electro-Voice ETX-18SP Powered Subwoofer today at the guaranteed lowest price from Sam Ash Direct with our 45-day return and 60-day price protection policy.Things You Will Get:ETX-18SP Powered SubwooferPower Cable(4) CastersOwner's Manual