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

Nominal diameter	210(8) mm (in.)
Nominal impedance	8 Ω
Minimum impedance	6 Ω
Program power (1)	500 W
AES Power rating(2)	250 W
Sensitivity (3)	94 dB
Frequency range	78 ~ 3500 Hz
Voice coil diameter	65(2.5) mm (in.)
Chassis material	Steel
Magnet material	Ferrite
Magnet dimensions (ODxIDxh)	156 x 80 x 20 mm
Coil material	SV
Former material	Glass Fiber
Xmax(4)	5 mm
Xmech(5)	9 mm
Gap height	8 mm
Voice coil Winding height	14 mm

DC resistance(Re)	4.5 Ω
Resonance frequency(Fs)	78 Hz
Moving mass(Mms)	24 g
Compliance(Cms)	0.17 mm/N
Force factor(BL)	13.20 N/A
Mechanical Q-factor(Qms)	3.5
Electrical Q-factor(Qes)	0.4
Total Q-factor(Qts)	0.36
Equivalent air volume(Vas)	17 I
Voice coil Inductance(Le)	0.19 mH
Diaphragm area(Sd)	227 cm2
Reference efficiency(Eta O)	1.3 %

Net weight	3.6 Kg
Multipack size (2) (W x D x H)	225 x 225 x 260 mm
Multipack weight	7.5 Kg

(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.