18in Professional Woofer w/3400 W continuous program power capacity 8-ohms

3400 W continuous program power capacity116 mm 4.5 in split winding copper voice coil35 - 1500 Hz response97 dB sensitivity60 mm peak-to-peak excursion before damageNeodymium magnet allows a very high force factor & linear excursionDouble silicone spider w/optimized complianceVentilated voice coil gap for reduced power compressionAluminium demodulating ring for very low distortion Nominal Diameter: Nominal Impedance: 8 ohm Minimum Impedance: 6.5 ohm Continuous Power Handling: 3400 W Nominal Power Handling AES: 1700 W Sensitivity 1W/1m: 97 dB Frequency Range: 35 - 1500 Hz Voice Coil Diameter: 116 mm 4.5 in Winding Material: Copper Glass Fibre Former Material Neodymium Inside Slug Magnet Material 34 mm 1.33 in Winding Depth 14 mm 0.55 in Magnetic Gap Depth 1.16 T Flux DensityDesign Triple Roll Surround Shape Radial Cone Shape Neodymium Inside Slug Magnet Type Double Silicone Spider T-Pole Pole Design 150 dm3 5.30 ft3 Recommended enclosure volume 35 Hz Recommended tuning frequencyParameters 32 Hz Fs 5.3 ohm Re 0.32 Qes 5.6 Qms 0.3 Qts 187 dm3 6.50 ft3 Vas 1210 cm2 187.60 in2 Sd 1.9 % η0 +/- 14 mm Xmax +/- 16 mm Xvar 275 g Mms 30.3 Txm Bl 1.9 mH Le 100 Hz EBPMounting & Shipping info 460 mm 18 in Overall Diameter 443 mm 17.44 in Bolt Circle Diameter 422 mm 16.6 in Baffle Cutout Diameter 242 mm 9.5 in Depth 16 mm 0.62 in Flange & Gasket Thickness 10.5 dm3 0.37 ft3 Air volume occupied by driver 11.9 kg 26.2 lb Net Weight 13.9 kg 30.6 lb Shipping Weight 500x500x250 mm 19.7x19.7x9.8 in Shipping Box RCK18SW1158 Service kit