Detalles

The 8MB400 mid-bass transducer has been developed in response to a specific market requirement for a 200 mm (8 in) midbass driver which combines excellent linearity with good efficiency and power handling capabilities.

It is primarily intended for use as a midbass driver in compact 2-way reflex enclosures with a 1 inch compression driver or tweeter but as a result of its versatile characteristics, it can also be used in multiway systems.
The curvilinear, treated paper cone is formed using a unique wood pulp composition designed to achieve the best possible rigidity and stiffness.
This is carried by a polycotton multiroll surround to provide increased excursion whilst controlling break up modes.
The 50 mm (2 inch) aluminum wire voice coil employs same Interleaved Sandwich Voice coil (ISV) technology. It is composed of a high strength fiberglas former carrying 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 by incorporating airways between the chassis back plate and the magnetic top plate to channel heated air away from the voice coil and gap and dissipate it.
In-house FEA CAD facilities have been used to optimise flux density and BL factor within the air gap. Due to the increasing use of sound systems at outdoor events, the 8MB400 ability to perform in humid environments is a key feature. This has been achieved using an exclusive cone treatment which renders the cone resistant to humidity.

98 dB SPL 1W / 1m average sensitivity
51 mm (2 in) Interleaved Sandwich Voice coil (ISV)
280 Watt AES power handling
Improved heat dissipation via unique basket design
Weather protected cone
Suitable for compact two way and multiway systems

General
Product type Cone driver
Brand Eighteen Sound
Reference 8MB400
Product code ALT080400WF08FC
Informations
Nominal impedance 8 ohm
Dimensional category 8.5 inch
Frequency coverage type Midbass, Midrange, High midrange
Manufacturer sensitivity 95 dB
Calculated sensitivity 93.48 dB
Nominal power handling 280 W
Max power handling 400 W
Bandwidth 55÷5200 Hz
Fundamental parameters
Sd 227 cm²
Mms 18 gr
Cms 348 µm/N
Le 0.96 mH
Re 5 ohm
BL 9.3 T.m
Small signal parameters
Fs 64 Hz
Qes 0.43
Qms 3.23
Qts 0.38
Vas 23.9 L
Datas
Xmax ±5.8 mm
EBP 149 Hz
Fs / Qts 168 Hz
Vas * Qts² 3.46 L
Calculated efficiency 1.4 %
Weight ~3.6 kg
Dimensions
Voice coil diameter 2 inch
Outside diameter 210 mm
Baffle cutout diameter 186 mm
Depth 99 mm
Front thickness 14 mm
Depth after front 85 mm
Shape & Materials
Front chape Cylindrical
Magnet type Ferrite

Recinto recomendado: 25 dm3 (0,88 ft3).
Sintonización recomendada: 70 Hz.