- 2 INCH COPPER VOICE COIL
 
- 91.5 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	260(10) mm (in.)
Nominal impedance	8 Ω
Minimum impedance	8.2 Ω
Program power (1)	500 W
AES Power rating(2)	250 W
Sensitivity (3)	91.5 dB
Frequency range	33 ~ 2500 Hz
Voice coil diameter	50(2.5) mm (in.)
Chassis material	Steel
Magnet material	Ferrite
Magnet dimensions (ODxIDxh)	120x60x20 110x60x15 mm
Coil material	SV/4L
Former material	Aluminium
Xmax(4)	5.5 mm
Xmech(5)	9.5 mm
Gap height	8 mm
Voice coil Winding height	15 mm

DC resistance(Re)	6.5 Ω
Resonance frequency(Fs)	33 Hz
Moving mass(Mms)	52 g
Compliance(Cms)	0.62 mm/N
Force factor(BL)	11.20 N/A
Mechanical Q-factor(Qms)	3.9
Electrical Q-factor(Qes)	0.42
Total Q-factor(Qts)	0.38
Equivalent air volume(Vas)	106 I
Voice coil Inductance(Le)	1.00 mH
Diaphragm area(Sd)	346 cm2
Reference efficiency(Eta O)	1 %

Net weight	3.3 Kg
Multipack size (2) (W x D x H)	280 x 280 x 316 mm
Multipack weight	7.4 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.