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12ND730 /16

12ND730 /16

Item is in stock



The 12ND730 transducer has been designed to meet market demand for high output woofers, capable of providing deep bottom-end in bandpass, horn or small reflex enclosures. The level of distortion is kept very low within its application range.
The 12ND730 is suitable for high loading enclosures, such as subwoofers or 2-way system reflex enclosures when coupled with a 1.4"-2" compression driver.
The neodymium magnet assembly developed by Eighteen Sound engineers 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 deep profile curvilinear cone, made 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-like material is highly resistant to aging and fatigue. The in-house developed cone treatment is fully water repellent and also gives a significant degree of rigidity to the cone.
The 75 mm Interleaved Sandwich Voice coil (ISV) assembly is wound on a strong fiberglas former that improves force transmission and thermal power handling.
The 4 threaded backplate holes give the user the possibility to insert an external-customised heat sink if further heat dissipation is required.
A special coating applied to both the top and back plates makes the 12ND730 far more resistant to the corrosive effects of salts and oxidization.

General Specifications

Nominal Diameter 300 mm (12 in)
Rated Impedance 8 Ohm
AES Power 400W
Program Power 600W
Peak Power 1200W
Sensitivity 98dB
Frequency Range 53 - 5000 Hz
Power Compression @-10dB 0,7 dB
Power Compression @-3dB 2,1 dB
Power Compression @Full Power 3,1 dB
Max Recomm. Frequency 1300 Hz
Recomm. Enclosure Volume 40 - 100 lt. (1,41 - 3,53 cuft)
Minimum Impedance
Max Peak To Peak Excursion 30 mm (1,18 in)
Voice Coil Diameter 75 mm (2,95 in)
Voice Coil winding material copper
Suspension Double roll, treated polycotton
Cone Curvilinear, treated paper

Thiele Small Parameters

Fs 45 Hz
Re 5,6 Ohm
Sd 0,0531 (82,31
Qms 5,13
Qes 0,24
Qts 0,23
Vas 90 lt. (3,18 cuft)
Mms 55 gr. (0,12 lb)
BL 19,2 Tm
Linear Mathematical Xmax ± 6,5 mm (± 0,26 in)
Le (1kHz) 1,73 mH
Ref. Efficiency 1W@1m (half space) 97,5 dB

Mounting information

Overall diameter 315 mm (12,4 in)
N. of mounting holes and bolt 8
Mounting holes diameter 7,15 mm (0,28 in)
Bolt circle diameter 296-300 mm (11,65-11,8 in)
Front mount baffle cutout ø 282 mm (11,1 in)
Rear mount baffle cutout ø 282 mm (11,1 in)
Total depth 132,5 mm (5,23 in)
Flange and gasket thickness 11,5 mm (0,45 in)
Net weight 3,8 kg (8,38 lb)
Shipping weight 4,6 kg (10,12 lb)
Packaging Dimensions 332 x 332 x 184 mm(13,07 x 13,07 x 7,24 in)


  • Model: 12ND730
  • Shipping Weight: 5.1kg
  • 10 Units in Stock
  • Manufactured by: 18 Sound


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