M1251 - LF Drivers

M1251 - LF Drivers

Product description:

High output low distortion mid bass transducer for compact 2-way speakers.

Main features: 

  • aluminum die-cast octagonal frame with small installation dimensions; 
  • removable self-centering ferrite magnet system; 
  • inside-outside copper clad aluminum voice coil;
  • ventilated voice coil gap;
  • double aluminum demodulation ring.

Product specification:

  • 12” nominal diameter;
  • 1000 W AES program power;
  • 97.5 dB 1W/1m sensitivity;
  • 3” CCAW voice coil;
  • 5.85 kg weight.

Specifications
Nominal diameter, inches (mm) 12(300)
Nominal impedance, Ohm 8/4
Rated power (AES), W 500
Frequency range, Hz 45-3500
Sensitivity (1W / 1m), dB 97.5
Minimum impedance, Ohm 6.8@285Hz
Bl product, Tm 17
Voice coil inductance, mH (1kHz) 0.7
Moving mass Mms, g 48
Voice coil
Diameter, inches (mm) 3 (76)
Winding material CCAW
Former material glass fiber
Winding depth, mm 19.2
Magnetic system
Magnetic gap depth, mm 8
Flux density, T 1.27
Thiele-Small parameters
Fs, Hz 51
Vas, l 75.7
Qts 0.29
Qes 0.31
Qms 5.6
Re, Оhm 5.7
Sd, сm2 519
Xmax, mm 7.6
n, % 3.1
Mounting information
Overall diameter, mm 303/338
Baffle cutout diameter, mm 282
Bolt hole diameter, mm 6x8
Bolt circle diameter, mm 315
Height, mm 146
Net weight, kg 5.85