M1240 - LF Drivers

M1240 - LF Drivers

Product description:

Мid bass transducer for two-way speakers. 

Main features: 

  • aluminum die-cast frame; 
  • removable self-centering ferrite magnet system with ventilated gap; 
  • inside-outside copper clad aluminum voice coil;
  • double silicon spider.

Product specification:

  • 12” nominal diameter;
  • 800 W AES program power;
  • 97 dB 1W/1m sensitivity;
  • 3” CCAW voice coil;
  • 7 kg weight. 

Specifications
Nominal diameter, inches (mm) 12(300)
Nominal impedance, Ohm 4/8
Rated power (AES), W 400
Frequency range, Hz 50-3000
Sensitivity (1W / 1m), dB 97
Minimum impedance, Ohm 6,9@250Hz
Bl product, Tm 20,8
Voice coil inductance, mH (1kHz) 1,0
Moving mass Mms, g 63,7
Voice coil
Diameter, inches (mm) 3(76)
Winding material CCAW
Former material glass fiber
Winding depth, mm 19
Magnetic system
Magnetic gap depth, mm 10
Flux density, T 1,3
Thiele-Small parameters
Fs, Hz 50,5
Vas, l 63,7
Qts 0,27
Qes 0,28
Qms 13,1
Re, Оhm 6,0
Sd, сm2 539
Xmax, mm 6
n, % 2,8
Mounting information
Overall diameter, mm 312
Baffle cutout diameter, mm 282
Bolt hole diameter, mm 7
Bolt circle diameter, mm 294
Height, mm 140
Net weight, kg 7