- 4 INCH COPPER VOICE COIL 

- 98 dB/SPL SENSITIVITY

- 2800 WATT PROGRAM POWER HANDING

- FEM OPTIMIZED MOTOR AND SUSPENSIONS

- 36mm PEAK TO PEAK MAXIMUM EXCURSION

- OPTIMIZED COOLING SYSTEM

- DOUBLE SPIDER

- RESONANCE FREE AND HEAVY DUTY BASKET DESIGN

- TRIPLE ROLL SURROUND

Nominal diameter	461(18) mm (in.)
Nominal impedance	8 Ω
Minimum impedance	7.1 Ω
Program power (1)	2800 W
AES Power rating(2)	1400 W
Sensitivity (3)	98 dB
Frequency range	38 ~ 1000 Hz
Voice coil diameter	100(4) mm (in.)
Chassis material	Aluminium
Magnet material	Ferrite
Magnet dimensions (ODxIDxh)	220 x 110 x 25 2pcs mm
Coil material	SV
Former material	Glass Fiber
Xmax(4)	12.5 mm
Xmech(5)	18 mm
Gap height	10 mm
Voice coil Winding height	30 mm

DC resistance(Re)	6 Ω
Resonance frequency(Fs)	38 Hz
Moving mass(Mms)	231 g
Compliance(Cms)	0.08 mm/N
Force factor(BL)	28.5 N/A
Mechanical Q-factor(Qms)	8.2
Electrical Q-factor(Qes)	0.41
Total Q-factor(Qts)	0.39
Equivalent air volume(Vas)	169 I
Voice coil Inductance(Le)	1.85 mH
Diaphragm area(Sd)	1325 cm2
Reference efficiency(Eta O)	2.6 %

Net weight	16.1 Kg
Multipack size (1) (W x D x H)	485 x 485 x 265 mm
Multipack weight	17.9 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.