Beschrijving
Key features
- 95 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
Description
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.
| GENERAL SPECIFICATIONS | |
| Nominal Diameter | 200 mm (8 in) |
| Rated Impedance | 8 Ohm |
| AES Power | 280 W |
| Program Power (1) | 400 W |
| Peak Power (2) | 800 W |
| Sensitivity (3) | 95 dB |
| Frequency Range (4) | 55 ? 5200 Hz |
| Power Compression @-10dB (5) | 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) |
| Minimum Impedance | 6,1 Ohm at 25?C |
| 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 (6) | |
| 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 (7) | ? 5,8 mm (? 0,23 in) |
| Le (1kHz) | 0,96 mH |
| Ref. Efficiency 1W@1m (half space) | 93,7 dB |
| MOUNTING INFORMATIONS | |
| Overall diameter | 210 mm (8,27 in) |
| N. of mounting holes | 6 |
| Mounting holes diameter | 6 mm (0,23 in) |
| Bolt circle diameter | 195 – 198 mm (7,68 – 7,80 in) |
| Front mount baffle cutout ? | 186 mm (7,32 in) |
| Rear mount baffle cutout ? | 184 mm (7,24 in) |
| Total depth | 99,5 mm (3,92 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) |
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