Eighteensound 8MB400 High Output Midbass Transducer Lautsprecher

95 dB SPL 1W / 1m average sensitivity51 mm (2 in) Interleaved Sandwich Voice coil (ISV)280 Watt AES power handlingImproved heat dissipation via unique basket designWeather protected coneSuitable for compact two way and multiway systems
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 compressiondriver 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 thehighly 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.

Nominal Diameter	200 mm (8 in)
Rated Impedance	8 Ohm
AES Power	280 W
Program Power	400 W
Peak Power	800 W
Sensitivity	95 dB
Frequency Range	55 ÷ 5200 Hz
Power Compression @-10dB	0,5 dB
Power Compression @-3dB	1,4 dB
Power Compression @Full Power	2,3 dB
Max Recomm. Frequency	3000 Hz
Recomm. Enclosure Volume	10 ÷ 40 lt. (0,35 ÷ 1,41 cuft)
Max Peak To Peak Excursion	19 mm (0,75 in)
Voice Coil Diameter	51 mm (2 in)
Voice Coil Winding Material	aluminum
Suspension	M-roll, Polycotton
Cone	Curvilinear, Treated paper

Thiele Small Parameters

Fs	64 Hz
Re	5 Ohm
Sd	0,0227 sq.mt. (35,19 sq.in.)
Qms	3,23
Qes	0,43
Qts	0,38
Vas	23,9 lt. (0,85 cuft)
Mms	18 gr. (0,04 lb)
BL	9,3 Tm
Linear Mathematical Xmax	± 5,8 mm (± 0,23 in)
Le (1kHz)	0,96 mH
Ref. Efficiency 1W@1m (half space)	93,7 dB

Mounting information

Overall diameter	210 mm (8,27 in)
N. of mounting holes and bolt	6
Mounting holes diameter	6 mm (0,23 in)
Bolt circle diameter	195 - 198 mm (7,68 - 7,80 in)
Front mount baffle cutout ø	186 mm (7,32 in)
Rear mount baffle cutout ø	184 mm (7,24 in)
Total depth	99,5 mm (3,92 in)
Flange and gasket thickness	14,5 mm (0,57 in)
Flange and gasket thickness	14,5 mm (0,57 in)
Net weight	3,6 kg (7,95 lb)
Shipping weight	3,92 kg (8,65 lb)
CardBoard Packaging dimensions	235 x 235 x 150 mm (9,25 x 9,25 x 5,91 in)