12" ACR 1250
Mid-range

SPECIFICATION

Nominal Diameter   12 inch / 305 mm
Nominal Impedance   8 ohm
Cone material   Black Paper
Edge   Cloth
Maximum Power   450 watt
Magnet Weight   41.37 Oz
Frequency Response   47 Hz – 4.2 KHz
Sensitivity 1 M / 1 W   95 dB
Voice Coil Diameter   2 inch / 49.5 mm
Voice Coil Former Material   Aluminium SV

THIELE SMALL PARAMETER

Resonance Frequency   Fs   47 Hz
DC resistance   Re   6.7 ohm
Mechanical Factor   Qms   2
Electical Factor   Qes   0.51
Total Factor   Qts   0.42
BL Factor   BL   12.7 T/m
Effective moving mass   Mms   41.6 Gram
Equivalent cas air load   Vas   106.9 Liter
Effective piston area   Sd   530.9 Cm2
Voice coil inductance   Le   0.38 mH
Half space efficiency   Eff   2.15 %

MOUNTING INFORMATION

Overall Diameter  306 mm
Bolt Circle Diameter   293 mm
Bolt Hole Diameter   6 mm
Front Mount   275 mm
Overall depth   126 mm