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.
Mounting and Shipping Info
Nominal Diameter300 mm ( in)
Nominal Impedance8 Ω
Nominal Power Handling1400 W
Continuous Power Handling2600 W
Frequency Range53 - 5000 Hz
Voice Coil Diameter75 mm (3.0 in)
Surround ShapeDouble roll
Woofer Cone TreatmentWeather protected
Recommended Enclosure60.0 dm3 (2.12 ft3)
Recommended Tuning50 Hz
Resonance Frequency45 Hz
Vas90.0 dm3 (3.18 ft3)
Sd531.0 cm2 (82.31 in2)
Overall Diameter315 mm (12.4 in)
Bolt Circle Diameter296 mm (11.65 in)
Baffle Cutout Diameter282.0 mm (11.1 in)
Depth132 mm (5.2 in)
Flange and Gasket Thickness11 mm (0.43 in)
Net Weight3.8 kg (8.38 lb)
Shipping Weight4.6 kg ( lb)
Shipping Box332 x 332 x 184 mm (13.07x13.07x7.24 in)
2 hours test made with continuous pink noise signal within the range Fs-10Fs. Power calculated on rated minimum impedance. Loudspeaker in free air.
Power on Continuous Program is defined as 3 dB greater than the Nominal rating.
Applied RMS Voltage is set to 2.83 V for 8 ohms Nominal Impedance.