The 4PRO 8003-AS is a vented, high output, active subwoofer system where the punch of a single 18” is desired. It is powered by a 1000 W compact and lightweight digital amplifier and the port area has been carefully designed for reduced distortion. It works equally well for portable or install applications and it is engineered to complement full-range loudspeakers in a wide range of PA situations.Features2000 Watt Peak, 1000 Watt RMS digital amplifier134 dB max spl18" ferrite magnet woofer, 4" voice coilLarge port area, for reduced distortionPFC power factor correctionAcoustical Specifications Frequency Response -3 dB: 40 Hz ÷ Xover p. HzMax SPL: 134 dBWoofer: 18" ferrite magnet, 4" voice coilInput/Output Section Input signal: bal / unbalInput connectors: Stereo c. xlr-jackOutput connectors: Stereo xlrInput sensitivity: - 2 dBu / +4 dBu Processor Section Crossover frequencies: 80 / 120 HzProtections: Thermal, rmsLimiter: Dinamic limiterControls: Volume, xover, phase 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 birchHandles: 2 sidePole Mount/Cap: YesColour: Black Physical Specifications Height: 700 / 27.56 mm/inchWidth: 520 / 20.47 mm/inchDepth: 700 / 27.56 mm/inchNet Weight: 49 / 108.02 kg/lbs.