15ND930 Extended LF Neodymium Transducer

Eighteen Sound - 15ND930 Extended LF Neodymium Transducer

Code: 18-15nd930-8


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Product Description

15ND930 Extended LF Neodymium Transducer

Key Features

  • 98 dB SPL 1W / 1m average sensitivity
  • 75 mm (3 in) edgewound voice coil
  • 500W AES power handling
  • Neodymium magnet assembly
  • Double Demodulating Rings (DDR) for lower distortion
  • Humidity resistant cone
  • Ideal for two way systems and for high loading compact subwoofer applications
  • External neodymium magnet assembly
  • Weather protected cone and plates for outdoor usage
  • Recommended for multiway systems and studio monitoring applications

The 15ND930 is a high power, high output, extended low frequency neodymium transducer which meets the most stringent requirements in high quality professional transducers. The high level of performance and sound quality have been achieved by exploiting the most advanced technologies available today. Thanks to its versatility, the 15ND930 can be used in 2-way compact reflex enclosures with a 1.4" compression driver, in multiway systems and in high loading sub woofers as small as 70 lt (compact reflex, bandpass and horn loaded configurations). The neodymium magnet assembly assures high flux concentration, low power compression and excellent heat exchange, since the external magnet configuration is considerably more efficient than traditional under-pole magnet topology. This results in high levels of force factor and power handling with an optimum power to weight ratio. The direct contact between the large heat sink and basket, together with the magnetic structure, represent a fundamental improvement in thermal connection and heat dissipation. Hence, power handling capabilities are increased and power compression lowered. The deep profile curvilinear cone, created from a special high strength wood pulp, has been designed to achieve the best possible linearity within its frequency range. The cone surround, made from a linen material is highly resistant to aging and fatigue. The in-house developed cone treatment is a humidity repellent and significantly dampens bell mode resonances. The 75mm (3in) copper edge-wound voice coil assembly is wound on a strong fiberglas former to improve force transmission and power handling. The already low distortion and sound quality are further improved by Double Demodulating Rings (DDR) that flatten impedance and phase with a constant power transfer. A special coating applied to both the top and back plates makes the 15ND930 far more resistant to the corrosive effects of salts and oxidization.


Nominal Diameter 380mm (15 in)
Rated Impedance 8 Ohm
AES Power 500W
Program Power 800W
Peak Power 1600W
Sensitivity 98 dB
Frequency Range 40 - 4100 Hz
Power Compression @-10dB 0,6 dB
Power Compression @-3dB 1,9 dB
Power Compression @Full Power 2,8 dB
Max Recomm. Frequency 1700 Hz
Recomm. Enclosure Volume 60 - 140 lt. (2,12 - 4,95 cuft)
Minimum Impedance 6,8 Ohm at 25°C
Max Peak To Peak Excursion 33 mm (1,3 in)
Voice Coil Diameter 75 mm (3 in)
Voice Coil winding material copper
Suspension M-roll, Polycotton
Cone Curvilinear, Treated paper

Thiele Small Parameters

Fs 36 Hz
Re 5,5 Ohm
Sd 0,085 sq.mt. (131,75 sq. in.)
Qms 5,3
Qes 0,23
Qts 0,22
Vas 206 lt. (7,28 cuft)
Mms 101 gr. (0,22 lb)
BL 23,8 Tm
Linear Mathematical Xmax ± 7,5 mm (± 0,30 in)
Le (1kHz) 1,61 mH
Ref. Efficiency 1W@1m (half space) 98,2 dB

Mounting information

Overall diameter 387 mm (15,24 in)
N. of mounting holes and bolt 8
Mounting holes diameter 7,15 mm (0,28 in)
Bolt circle diameter 370-371 mm (14,55-14,6 in)
Front mount baffle cutout ø 353 mm (13,9 in)
Rear mount baffle cutout ø 357 mm (14,06 in)
Total depth 177 mm (7 in)
Flange and gasket thickness 11,5 mm (0,45 in)
Net weight 4,1 kg (9 lb)
Shipping weight 5,7 kg (12,56 lb)
Packaging Dimensions 5,7 kg (12,56 lb)