Bumper 1565 C 15" Speaker

Series C
Model 1565 C
Diameter size in inches 15
Diameter size in centimeters 38.1
Z - Nominal Impedance in Ohms 8
Fs = Free air resonance frequesncy in Hz 48.4
Qts = Total Q Factor of driver 0.5
Vas = Equivalent acoustic volume in cubic feet 3.8
Vas = Equivalent acoustic volume in liters 107.31
Xmax = peak linear displacement of cone in inches 0.17
Xmax = peak linear displacement of cone in mm 4.32
Pe = Max power in watts 510
Ref = Driver's SPL 1W at 1m in Db 95.2
SPL = The half-space ref Efficiency 95.2
Voice Coil Diameter in inches 2.5
Mounting Depth in inches 6
Sd = Piston Area in sq m 0.076
BL = T*M Flux Density, Length Product 15.32
no = The half-space ref effciency 0.0209
Cms = Mechanical suspen Compliance 130.831
Mms = Mech mass of cone & free air load 82.529
Qms = Mechanical Q factor of driver 4.461
Qes = Electrical Q factor of driver 0.5653
Revc = DC Voice coil resistance in Ohms 5.28
Zmax = imped At top of resonance curve in Ohms 46.948
Fo = Free air resonance frequency in Hz 48.4
Magnet weight (oz) 65
Magnet weight (kg)