Light in weight but certainly not in performance, the BN10-200X neodymium bass speaker delivers a rich warm tone combined with a powerful low end punch. Nominal diameter 10 , 254mm Power rating 200W Nominal impedance 8 Sensitivity 96dB Magnet type Neodymium Voice coil diameter 2 , 50.8mm Coil material Copper Cone material Kevlar loaded paper Former material Polyimide Surround material Cloth-sealed Frequency range 45-3500Hz Xmax 0.15 , 4mm Gap depth 0.31 , 8mm Voice coil winding width 0.62 , 16mm Small Signal Parameters D 0.21m/8.3in Fs 50.7Hz Mms 32.21g/1.14oz Qms 3.67 Qes 0.297 Mmd 24.93g/0.88oz Qts 0.274 Re 5.9 Vas 52lt/1.84cu.ft. BI 14.29Tm Cms 0.306mm/N Rms 2.79kg/s Le (at 1kHz) 0.63mH Mounting Information Cut-out diameter 9 , 229mm Diameter 10.1 , 256mm Mounting slot dimensions 0.24×0.31 , 6x8mm Mounting slot PCD 9.6 , 245mm Number of mounting slots 8 Overall depth 4.4 , 112mm Unit weight 3.3lb, 1.5kg