Brand NEW Aftermarket Replacement QSC 18" 1000-Watt 8 Ohms Sub Woofer Speaker For QSC HPR - 181i ; QSC HPR 181w ; SP-000080-GP ; QSC KW 181 ; QSC XD-000005-00.FTR18-4080FDX This tough and hard-working 18 die-cast frame speaker has delivering superb heat dissipation to guarantee a massive 2000 Watts of continuous power handling (equivalent to a 1000W rms AES). Specifications: Nominal diameter - 457mm / 18in Power rating - 1000W RMS Nominal impedance - 8 Ohms Sensitivity - 96dB Frequency range - 30-2500Hz Voice coil diameter - 100mm/4in Chassis type - Cast aluminium Magnet type - Ferrite Coil material - Round copper Former material - Glass fibre Cone material - Glass loaded paper with weather-resistant impregnation Surround material - Cloth-sealed Suspension - Double Xmax - 8mm/0.33in Gap depth - 9.5mm/0.37in Voice coil winding width - 25mm/0.99in Magnet weight - 3.1kg/110oz Small Signal Parameters: D 0.33m/12.99in Fs 40.5Hz Mms 153.53g/5.42oz Mmd 139.38g/4.92oz Qms 3.98 Qes 0.36 Qts 0.33 Re 5.10 Ohms Vas 104.27lt/3.68ft3 Bl 23.53Tm Cms 0.10mm/N Rms 9.81kg/s Le (at 1kHz) 1.8mH Mounting Information: Diameter: 452mm Overall depth: 205mm/8.07in Cut-out diameter: 416mm/16.38in Mounting slot dimensions: 10mm x 7mm/0.4in x 0.27in Number of mounting slots: 8 Mounting PCD range: 429-440mm/16.89-17.32in Impendance 8 Ohms Unit weight: 9.8kg/21.6lb.