Bumper DRC Series Pro Audio Speakers. - (0648 DRC)

Bumper DRC Series Pro Audio Speakers.

Speaker Model: 648 DRC

Diameter size in inches: 6.5
Diameter size in centimeters: 16.5
Z=Nominal Impedance in Ohms: 6.5
Fs=Free air resonance frequency in Hz: 76.71
Qts=Total Q Factor of driver: 0.296
Vas=Equivalent acoustic volume in cubic feet: 0.560
Vas=Equivalent acoustic volume in liters: 15.67
Xmax=peak linear displacement of cone in inch: 0.1
Xmax=peak linear displacement of cone in mm: 3.900
Pe=Max power in watts: 350
SPL=The half-space ref. Efficiency: 96.29
Voice Coil Diameter in inch: 2.0
Mounting Depth in inch: 2  3/4
Sd=Piston Area in sq.m: 165.1
BL=T*M Flux Density, Length Product: 11.00
no=The half-space ref. Efficiency: 2.08%
Cms=Mechanical Suspen. Compliance: 0.25
Mms=Mech. Mass of cone & free air load: 17.47
Qms=Mechanical Q factor of driver: 3.026
Qes=Electrical Q factor of driver: 0.328
Revc=DC Voice coil resistance in Ohms: 4.7
Zmax=imped. At top of resonance curve in Ohm: 48.19
Frequency response range tested from 20-2000 Hz: 77-5k
Magnet Assembly Weight (oz): 106