Data Sheet

8NMB420
High Output Midbass Neo Transducer
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
General 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.
022088N400 8ohm
022086N400 16ohm
022084N400 4ohm
NEODYMIUM LF-MB-MF TRANSDUCERS
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