B&C 8CXN51 8-in Mid-woofer W/500 Watts

500 w continuous program power capacity100 nominal coverage70 - 18000 hz response97 db sensitivitysingle neodymium magnet assemblyspecifications210 mm (8 in) nominal diameter8 ohmnominal impedance6 ohm (lf) 7.4 ohm (hf) minimum impedance70 - 18000 hzfrequency range100dispersion anglepolyimidediaphragm material 1.8 khzrecom crossoverneodymium ringmagnet materiallf unit97 dbsensitivity (1w / 1m)500 wcontinuous power handling250 wnominal power handling (aes) 51 mm (2 in) voice coil diameteraluminiumwinding materialhf unit104 dbsensitivity (1w / 1m)100 wcontinuous power handling50 wnominal power handling (aes) 44 mm ( 1.7 in)voice coil diameteraluminiumwinding materialparameters68 hzfs 4.9 ohmre 0.29 qes 4.7 qms 0.27 qts17 dm3 ( 0.60 ft3)vas220 cm2 ( 34.10 in2)sd 1.8 %&951; 0 6 mmxmax 6 mmxvar22 gmms 12.6 txmbl 0.9 mhlemounting and shipping info225 mm ( 8.8 in)overall diameter210 mm ( 8.3 in)bolt circle diameter187 mm ( 7.4 in)baffle cutout diameter111 mm ( 4.4 in)depth 9.8 mm ( 0.4 in)flange and gasket thickness 2.5 kg ( 5.5 lb)net weight 3.2 kg (7 lb) shipping weight260x260x170 mm ( 10.2 x 10.2 x 6.7 in)shipping boxrck008cxn518service kit lfmmd4008service kit hf [single]