The HDL18-AS is a compact, flyable high power subwoofer, designed to integrate seemlessly into a HDL 20-A flown array. The bass reflex design guarantees a deep, linear power response while the 4” voice coil vented design woofer offers the minimum of power compression. The system provides integrated mechanics compatible with the HDL 20-A array module.Features2000 Watt Peak power - 1000 Watt RMS135 dB max SPL30 Hz - 140 Hz frequency response1 x 18" WooferDSP controlled Input section with selectable presetsTour grade safe and solid variable mechanics, compatible with HDL 20-ADesigned to compliment the HDL 20-A speaker systemBaltic birch tour grade cabinetAcoustical Specifications Frequency Response -3 dB: 30 Hz ÷ 140 HzMax SPL: 135 dBWoofer: 18", 4.0" v.c. Input/Output Section Input signal: bal/unbalInput connectors: XLROutput connectors: XLRInput sensitivity: -2 dBu / +4 dBu Processor Section Protections: Thermal, RMSLimiter: Soft limiterControls: Volume, EQ shape, Xover Amplifier Specifications Total power: 2000 W PEAK Low frequencies: 2000 W PEAKTotal power: 1000 W RMS Low frequencies: 1000 W RMSCooling: Convection/forcedConnections: Powercon in/out Cabinet Cabinet Material: Baltic BirchHardware: Rigging flyware, M20 insertHandles: 2 sideColour: Black Physical Specifications Height: 511.5 / 20.1 mm/inchWidth: 700 / 27.5 mm/inchDepth: 620 / 24.4 mm/inchNet Weight: 48.4 / 106.7 kg/lbs.