8NDF65M1 LF Drivers 8 inchs

Notes

2.5 INCH EDGEWOUND CCA VOICE COIL
 
95.3 dB/SPL SENSITIVITY
 
500 WATT PROGRAM POWER HANDING
 
FEM OPTIMIZED MOTOR AND SUSPENSIONS
 
OPTIMIZED COOLING SYSTEM
 
RESONANCE FREE AND HEAVY DUTY BASKET DESIGN 

GENERAL SPECIFICATIONS

Nominal diameter 203-213(8) mm (in.)
Nominal impedance 8 Ω
Minimum impedance 6.3 Ω
Program power (1) 500 W
AES Power rating(2) 250 W
Sensitivity (3) 95.3 dB
Frequency range 68~4500 Hz
Voice coil diameter 65(2.5) mm (in.)
Chassis material Aluminium
Magnet material Neodymium
Magnet dimensions (ODxIDxh) 64x10x10 1pc mm
Coil material CCAW
Former material Glass Fiber
Xmax(4) 5 mm
Xmech(5) 9 mm
Gap height 8 mm
Voice coil Winding height 14 mm

SMALL SIGNAL PARAMETERS

DC resistance(Re) 5 Ω
Resonance frequency(Fs) 68 Hz
Moving mass(Mms) 28 g
Compliance(Cms) 0.20 mm/N
Force factor(BL) 14.2 N/A
Mechanical Q-factor(Qms) 4.32
Electrical Q-factor(Qes) 0.35
Total Q-factor(Qts) 0.32
Equivalent air volume(Vas) 22 I
Voice coil Inductance(Le) 0.73 mH
Diaphragm area(Sd) 248 cm2
Reference efficiency(Eta O) 1.9 %

SHIPPING INFORMATION

Net weight 2.4 Kg
Multipack size (1) (W x D x H) 225x225x152 mm
Multipack weight 2.7 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.