- 6 INCH COPPER VOICE COIL
 
- 95.6 dB/SPL SENSITIVITY
 
- 4200 WATT PROGRAM POWER HANDING
 
- FEM OPTIMIZED MOTOR AND SUSPENSIONS
 
- 53mm PEAK TO PEAK MAXIMUM EXCURSION
 
- OPTIMIZED COOLING SYSTEM
 
- DOUBLE SPIDER
 
- RESONANCE FREE AND HEAVY DUTY BASKET DESIGN
 
- TRIPLE ROLL SURROUND

Nominal diameter	460(18) mm (in.)
Nominal impedance	4 Ω
Minimum impedance	3.9 Ω
Program power (1)	4200 W
AES Power rating(2)	2100 W
Sensitivity (3)	95.6 dB
Frequency range	33~1000 Hz
Voice coil diameter	151(6) mm (in.)
Chassis material	Aluminium
Magnet material	Neodymium
Magnet dimensions (ODxIDxh)	146x60x10 mm
Coil material	SV
Former material	Glass Fiber
Xmax(4)	15.8 mm
Xmech(5)	26.5 mm
Gap height	17 mm
Voice coil Winding height	40 mm

DC resistance(Re)	3.6 Ω
Resonance frequency(Fs)	33 Hz
Moving mass(Mms)	371 g
Compliance(Cms)	0.06 mm/N
Force factor(BL)	31.1 N/A
Mechanical Q-factor(Qms)	6.12
Electrical Q-factor(Qes)	0.39
Total Q-factor(Qts)	0.36
Equivalent air volume(Vas)	231 I
Voice coil Inductance(Le)	3.01 mH
Diaphragm area(Sd)	1325 cm2
Reference efficiency(Eta O)	2.5 %

Net weight	20.8 Kg
Multipack size (1) (W x D x H)	485 x 485 x 296 mm
Multipack weight	22.5 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.