18NDS125AU Subwoofers 18 inchs

Notes

- 5 INCH COPPER VOICE COIL

- 97.1 dB/SPL SENSITIVITY

- 3000 WATT PROGRAM POWER HANDING

- FEM OPTIMIZED MOTOR AND SUSPENSIONS

- 46mm PEAK TO PEAK MAXIMUM EXCURSION

- OPTIMIZED COOLING SYSTEM

- DOUBLE SPIDER

- RESONANCE FREE AND HEAVY DUTY BASKET DESIGN

- TRIPLE ROLL SURROUND

GENERAL SPECIFICATIONS

Nominal diameter	460(18) mm (in.)
Nominal impedance	8 Ω
Minimum impedance	7.7 Ω
Program power (1)	3000 W
AES Power rating(2)	1500 W
Sensitivity (3)	97.1 dB
Frequency range	34~1000 Hz
Voice coil diameter	125(5) mm (in.)
Chassis material	Aluminium
Magnet material	Neodymium
Magnet dimensions (ODxIDxh)	115 x 45 x16 mm
Coil material	SV
Former material	Glass Fiber
Xmax(4)	14.5 mm
Xmech(5)	23 mm
Gap height	14 mm
Voice coil Winding height	36 mm

SMALL SIGNAL PARAMETERS

DC resistance(Re)	6 Ω
Resonance frequency(Fs)	34 Hz
Moving mass(Mms)	267 g
Compliance(Cms)	0.08 mm/N
Force factor(BL)	27.1 N/A
Mechanical Q-factor(Qms)	7.38
Electrical Q-factor(Qes)	0.39
Total Q-factor(Qts)	0.37
Equivalent air volume(Vas)	211 I
Voice coil Inductance(Le)	2.77 mH
Diaphragm area(Sd)	1325 cm²
Reference efficiency(Eta O)	2.8 %

SHIPPING INFORMATION

Net weight	11.9 Kg
Multipack size (1) (W x D x H)	485 x 485 x 262 mm
Multipack weight	13.8 Kg

OTHERS

(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.

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