Bumper C Series Pro Audio Speakers - (0865 C)

Bumper C Series Pro Audio Speakers.

Speaker Model 865 C

Diameter size in inches: 8'
Diameter size in centimeters: 20.0
Z=Nominal Impedance in Ohms: 8
Fs=Free air resonance frequency in Hz: 63.25
Qts=Total Q Factor of driver: 0.292
Vas=Equivalent acoustic volume in cubic feet: 1.201
Vas=Equivalent acoustic volume in liters: 34
Xmax=peak linear displacement of cone in inch: 0.1
Xmax=peak linear displacement of cone in mm: 2.500
Pe=Max power in watts: 450
SPL=The half-space ref. Efficiency: 96.37
Voice Coil Diameter in inch: 2
Mounting Depth in inch: 3 1/2
Sd=Piston Area in sq.m: 203.2000
BL=T*M Flux Density, Length Product: 15.46
no=The half-space ref. Efficiency: 2.67%
Cms=Mechanical Suspen. Compliance: 0.23
Mms=Mech. Mass of cone & free air load: 27.51
Qms=Mechanical Q factor of driver: 5.996
Qes=Electrical Q factor of driver: 0.307
Revc=DC Voice coil resistance in Ohms: 5.6
Zmax=imped. At top of resonance curve in Ohm: 137.80
Frequency response range tested from 20-2000 Hz: 63-5k
Magnet Assembly Weight (oz): 151