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

Nominal diameter	389(15) mm (in.)
Nominal impedance	8 Ω
Minimum impedance	6.2 Ω
Program power (1)	800 W
AES Power rating(2)	400 W
Sensitivity (3)	96.8 dB
Frequency range	39 ~ 3000 Hz
Voice coil diameter	75(3) mm (in.)
Chassis material	Aluminium
Magnet material	Neodymium
Magnet dimensions (ODxIDxh)	138 x 90 x 10 mm
Coil material	ALR
Former material	Glass Fiber
Xmax(4)	7.5 mm
Xmech(5)	13 mm
Gap height	8 mm
Voice coil Winding height	18 mm
Diaphragm material	Titanium
Program power(1)	220 W
AES Power rating(2)	110 W
Sensitivity(3)	108 dB
Frequency range	500 ~ 18000 Hz
Voice coil diameter	72(3) mm (in.)
Coil material	ALR

DC resistance(Re)	5 Ω
Resonance frequency(Fs)	39 Hz
Moving mass(Mms)	71 g
Compliance(Cms)	0.23 mm/N
Force factor(BL)	14.3 N/A
Mechanical Q-factor(Qms)	5.3
Electrical Q-factor(Qes)	0.54
Total Q-factor(Qts)	0.49
Equivalent air volume(Vas)	289 I
Voice coil Inductance(Le)	0.25 mH
Diaphragm area(Sd)	924 cm2
Reference efficiency(Eta O)	2.9 %

Net weight	5.1 Kg
Multipack size (1) (W x D x H)	410 x 410 x 231 mm
Multipack weight	6 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.