18 -sound 12ND930 Low Frequency Neodymium Driver (8 ohm)

Beschrijving

Key features

• • 98 dB SPL 1W / 1m average sensitivity
  • 75 mm (3 in) Interleaved Sandwich Voice coil (ISV)
  • 500 W AES power handling
  • External neodymium magnet assembly
  • Double Demodulating Rings (DDR) for lower distortion
  • Humidity resistant cone
  • Ideal for 2 way systems and compact high loading subwoofer applications

Description

The 12ND930 is a high power, high output, low frequency woofer meeting
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 12ND930 can be used in two-way compact reflex
enclosures with a 1.4″ compression driver, in multi-way systems and in
high loading sub woofers as small as 50 lt (compact reflex, band-pass
and hornloaded 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 the basket, together with the magnetic structure,
represents a fundamental improvement in thermal connection and heat
dissipation. The result is increased power handling capabilities and
lower power compression.
The curvilinear cone profile, created
with a special high strength wood pulp, has been designed to achieve
the best possible linearity within its frequency range. The cone
surround in linen material is highly resistant to aging and fatigue.
The in-house developed cone treatment is a humidity repellent and
significant dampens bell mode resonance.
The 12ND930 employs our
Interleaved Sandwich Voice coil (ISV) in which a high strength
fiberfiberglas former carries windings on both the outer and inner
surfaces to achieve a mass balanced coil. The final result is an
extremely linear motor assembly with a reduced tendency for eccentric
behavior when driven hard.
The already low distortion and sound
quality are further improved by Double Demodulating Rings (DDR), that
flatten impedance and phase figures with a constant power transfer.
A
special coating applied to both the top and back plates makes the
12ND930 far more resistant to the corrosive effects of salts and
oxidization.