Key Features: ► The rugged enclosure is constructed from 19 mm (34 in) MDF (Medium Density Fiberboard) using advanced adhesives and mechanical fastener technology for durability and improved low-frequency performance. The enclosure is covered in black carpet. ► Heavy duty, all steel handles are used. ► A top mounted, cast aluminum 35 mm pole mount receptacle can receive an optional SS3BK pole to facilitate use of the JRX118Sp as a base for a mid-high speaker cabinet. ► Built-in 500 watt (peak), 300 watt (continuous) amplifier. Controls, connectors, and indicators are clearly labeled with large, high-contrast graphics for easy operation in poorly lit environments. ► Integral, preset limiter prevents clipping distortion. An LED illuminates to indicate that limiting is taking place. ► Line-level stereo inputs are summed before being sent to the subwoofer’s internal amplifier. This feature allows the JRX118SP to operate in stereo systems using a single subwoofer. ► An integral crossover also provides balanced, line-level, stereo, high-passed outputs to feed powered satellite speakers or an external amplifier for passive satellites. ► A speaker-level, V" TS phone jack is provided. This input is useful in applications, such as those employing powered mixers, in which it is more practical to bring a full-range, speaker-level signal to the subwoofer amplifier. The JRX118SP is an 18 inch direct-radiating powered subwoofer. A built-in 500 watt (peak) amplifier accepts stereo or mono line level inputs via balanced, XLR connectors as well as single channel speaker level input via a V inch phone jack. Integral signal processing includes a stereo crossover and limiting for the internal amplifier. A pair of XLR output connectors may be used to pass the input signals to another system or to send a high-passed, line-level stereo signal to a pair of powered, full-range speakers.