Key features
- 100 dB SPL 1W / 1m average sensitivity
- 44 mm (1 3/4 in) voice coil
- 200 W AES power handling
- External neodymium magnet assembly
- Single Demodulating Ring (SDR) for lower
distortion
- Weather protected cone and plates for
outdoor usage
- Improved heat dissipation via Active
Cooling System
- Specially designed for line arrays and
compact two way systems
022068N440 8Ohm
022066N440 16Ohm
Description
The 6NMB420 is a 44mm voice coil 6.5 inch neodymium
midbass transducer designed for mid low frequency
reproduction in system designs where high
intelligibility is required.
When compared to our 6ND410 state-of-the-art
midrange transducer, 6NMB420 offers a lower
frequency resonance and a longer linear Xmax value.
As a result the speaker shows an increased output
around 250Hz, with a consequent slightly reduced
output above 700Hz.
It is suitable as mid-bass in line array systems or
multiple way systems with high-pass crossover above
200 Hz and low-pass up to 3kHz; enclosure might be
closed or vented with volume size starting from 2
lit.
The speaker offers a superb linearity: distortion
values are furtherly minimized by new enhanced
design criterias, developed by Eighteen Sound
engineers, taking the 6NMB420 to very high level of
performance.
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.
A consistent heat transfer is guaranteed by the
encapsulation of the magnetic structure in the
interior of the basket, offering a large contact
space between the back plate and the dissipating
structure.
Particular efforts were dedicated to the surround
shape and material design in order to minimize the
resonances on mid range frequencies. The triple roll
design offers a consistent damping to typical bell
modes.
The 44 mm voice coil is made of light-weight
aluminum wire and assures linearity and high power
handling.
The ability to perform in humid environments is a
key feature of the 6NMB420: this is achieved through
a proprietary humidity repellent cone treatment.
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