The SXC118 is a cardioid active subwoofer. It is a great option for medium sized events or install applications. From the Manufacturer: Designed for touring sound and installations, the SXC118 is a compact, high performance cardioid subwoofer. It features an 18” (460mm) forward facing driver and a 14” (356mm) rear facing driver, each driven independently by separate amplifier channels and DSP. Features: Compact, cardioid subwoofer Front facing 18” (460mm)/4” (100mm) voice coil driver Rear facing 14” (356mm)/3.5” (88mm) voice coil driver Cardioid dispersion pattern 28dB rear rejection at 75Hz High output capability Tour-grade plywood enclosure with flying inserts Applications: Live sound reinforcement Fixed installations including live event venues and nightclubs Theatre sound Corporate AV events Acoustically-challenging rooms Outdoor restaurant, bar and hotel entertainment areas Concourses and Theme Parks Specifications: Type Compact, cardioid subwoofer Frequency Response 43Hz – 150Hz ±3dB, -10dB @ 34Hz Drivers 18” (460mm)/4” (100mm) voice coil, long excursion, ferrite magnet, waterproof cone 14” (356mm)/3.5” (88mm) voice coil, long excursion, neodymium magnet, waterproof cone Rated Power 18”: 1000W AES, 4000W peak 14”: 800W AES, 3200W peak Sensitivity 104dB Maximum SPL 140dB peak Nominal Impedance 18”: 8Ω 14”: 8Ω Dispersions (-6dB) Cardioid Enclosure Multi-laminate birch and poplar ply Finish Textured black paint Protective Grille Black HEX perforated steel Connectors 2 x NL4 Pin Connections (Input) 18”: +1, -1; 14”: +2, -2 Pin Connections (Link) 18”: +1, -1; 14”: +2, -2 Fittings Two skids on base, with mating channels on top M20 top-mounted thread plate for pole mounting Two bar handles on each side Four fittings for optional transit cover 16 x M10 Mounting Points 16 x M8 inserts for optional castors Two bar handles on each side Dimensions (INCL Skids) (W) 650mm x (H) 603mm x (D) 812mm (940mm incl castors) (W) 25.6in x (H) 23.7in x (D) 32in (37in incl castors) Weight 69kg (152lbs) 73kg (161lbs) incl castors