12NDF75M1 LF Drivers 12 inchs

Notes

3 INCH COPPER VOICE COIL
 
97.1 dB/SPL SENSITIVITY
 
800 WATT PROGRAM POWER HANDING
 
FEM OPTIMIZED MOTOR AND SUSPENSIONS
 
OPTIMIZED COOLING SYSTEM
 
RESONANCE FREE AND HEAVY DUTY BASKET DESIGN
 

GENERAL SPECIFICATIONS

Nominal diameter 302-320 (10) mm (in.)
Nominal impedance 8 Ω
Minimum impedance 5.7 Ω
Program power (1) 800 W
AES Power rating(2) 400 W
Sensitivity (3) 97.1 dB
Frequency range 51~3200 Hz
Voice coil diameter 75(3) mm (in.)
Chassis material Aluminium
Magnet material Neodymium
Magnet dimensions (ODxIDxh) 74x15x10 1pc mm
Coil material CCAW
Former material Glass Fiber
Xmax(4) 5 mm
Xmech(5) 10.5 mm
Gap height 10 mm
Voice coil Winding height 15 mm

SMALL SIGNAL PARAMETERS

DC resistance(Re) 4.5 Ω
Resonance frequency(Fs) 51 Hz
Moving mass(Mms) 50 g
Compliance(Cms) 0.21 mm/N
Force factor(BL) 17.3 N/A
Mechanical Q-factor(Qms) 5.3
Electrical Q-factor(Qes) 0.34
Total Q-factor(Qts) 0.32
Equivalent air volume(Vas) 107 I
Voice coil Inductance(Le) 0.87 mH
Diaphragm area(Sd) 581 cm2
Reference efficiency(Eta O) 3.3 %

SHIPPING INFORMATION

Net weight 3.7 Kg
Multipack size (1) (W x D x H) 330 X 330 X 180 mm
Multipack weight 4.1 Kg

OTHERS

(1)Program power is defined as 3 dB greater than AES Power. 
(2) Tested for two hours using a continuous, band-limited pink noise signal as per AES 2-1984 Rev. 2003. Loudspeaker tested in free air.
(3) From T/S parameters, measured with LMS DA LPM module. 
(4) The Xmax is calculated as: (Hvc - Hg)/2+ Hg/4. Hvc is the voice coil height and Hg the gap height. 
(5) The Xmech is calculated as: (Hvc - Hg)/2 +(Hg-2). Hvc is the voice coil height and Hg the gap height.
(6) Thiele-Small parameters are measured after preconditioning: a) at 20°C- 22°C, 50% humidity for 2 hours; b) by LMS LSI measurement.