- 3 INCH ALUMINIUM VOICE COIL
 
- 97.2 dB/SPL SENSITIVITY
 
- 800 WATT PROGRAM POWER HANDING
 
- FEM OPTIMIZED MOTOR AND SUSPENSIONS
 
- OPTIMIZED COOLING SYSTEM
 
- RESONANCE FREE AND HEAVY DUTY BASKET DESIGN
 
- ALUMINIUM DEMODULATING RING

Nominal diameter	311(12) mm (in.)
Nominal impedance	8 Ω
Minimum impedance	6.7 Ω
Program power (1)	800 W
AES Power rating(2)	400 W
Sensitivity (3)	97.2 dB
Frequency range	52 ~ 3500 Hz
Voice coil diameter	75(3) mm (in.)
Chassis material	Aluminium
Magnet material	Neodymium
Magnet dimensions (ODxIDxh)	74 x 15 x 10 mm
Coil material	ALR
Former material	Glass Fiber
Xmax(4)	6.2 mm
Xmech(5)	11.7 mm
Gap height	10 mm
Voice coil Winding height	17.5 mm

DC resistance(Re)	5.1 Ω
Resonance frequency(Fs)	52 Hz
Moving mass(Mms)	61 g
Compliance(Cms)	0.17 mm/N
Force factor(BL)	16.70 N/A
Mechanical Q-factor(Qms)	4.3
Electrical Q-factor(Qes)	0.39
Total Q-factor(Qts)	0.36
Equivalent air volume(Vas)	60 I
Voice coil Inductance(Le)	0.80 mH
Diaphragm area(Sd)	544 cm2
Reference efficiency(Eta O)	2.5 %

Net weight	4.2 Kg
Multipack size (1) (W x D x H)	325 x 325 x 175 mm
Multipack weight	4.8 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.