18 -sound 8NMB420 High Output MB Neodymium (4 /8 / 16 ohm)

Beschrijving

Key features

• • 95 dB SPL 1W / 1m average sensitivity
  • 51mm (2 in) Interleaved Sandwich Voice coil (ISV)
  • 280 W AES power handling
  • External neodymium magnet assembly
  • Single Demodulating Ring (SDR) for lower distortion
  • Weather protected cone and plates for outdoor usage
  • Suitable for line arrays and compact two way systems

Description

The 8NMB420 neodymium transducer has been developed in response to a
specific market requirement for a 8? midbass driver that combines
excellent linearity with good efficiency and high power handling
capabilities.
8NMB420
is primarily intended for use as a midbass driver in compact 2-way or
multiway reflex enclosures comprising line arrays. The parameters had
been chosen to offer significant low frequency output in vented
enclosure with size starting from 20 lit. with a tuning frequency
around 60Hz. The low pass filter might be positioned as high as
2000-2500Hz. Multiple 8NMB420 units might be used: the compact size
reflects in the capability to have precise attack time. This
characteristic makes it the ideal choice for stage monitoring and bass
guitar amplification.
The extremely powerful external neodymium
magnet assembly assures high flux concentration, low power compression
and excellent heat exchange. The levels of force factor and power
handling are, as a consequence, at the upper professional level with
best power to weight ratio.
The exclusive dedicated double roll
surround design offers enhanced linear travel and control, in order to
reproduce precisely low frequency. The curvilinear paper cone is formed
using a unique wood pulp composition designed to achieve the best
possible rigidity and stiffness.
The 50mm inside outside aluminum
voice coil employs Interleaved Sandwich Voice coil (ISV) technology. It
is composed by a high strength fiberglass former used to carry windings
on both the outer and inner surfaces to achieve a mass balanced coil.
This results in an extremely linear motor assembly which, in
conjunction with the highly advanced design of the magnetic structure,
provides a high force factor or BL. The voice coil is cooled
incorporating airways between the chassis back plate and the magnet
faceplate so that heated air is channeled away from the voice coil and
gap and dissipated by the chassis basket.
Thanks to the increasing
use during outdoor audio events, the ability to perform in humid
environments is a key feature of the 8NMB420. This is achieved trough a
proprietary humidity repellent cone treatment without a moving speaker
mass increase.