18 Sound 8MB500 Mid-Bass Ferrite Transducer 8 Ohm Peak Power 800W Free Shipping

Regular price $ 149.00

Key Features

  • 95 dB SPL 1W / 1m average sensitivity
  • 51 mm (2 in) Interleaved Sandwich Voice coil (ISV)
  • 400 Watt program power handling
  • Triple roll suspension for increased motion control
  • Weather protected tretaed cellulose cone
  • Lightweight diecast aluminum basket design
  • Suitable for compact two way and multiway systems


    The 8MB500 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 8MB500 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
400 W
Peak Power
800 W
95 dB
Frequency Range
60 ÷ 4500 Hz
Power Compression At -10dB
0,5 dB
Power Compression At -3dB
1,4 dB
Power Compression At Full Power
2,3 dB
Max Recomm. Frequency
3000 Hz
Recomm. Enclosure Volume
10 ÷ 40 lt. (0,35 ÷ 1,41 cuft)
Minimum Impedance
5,8 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
Triple-roll, Polycotton
Curvilinear, Treated cellulose

Thiele Small Parameters

74 Hz
5,1 Ohm
0,023 sq.mt. (35,65 sq.in.)
21,5 lt. (0,76 cuft)
17 gr. (0,04 lb)
9,0 Tm
Linear Mathematical Xmax
± 6 mm (± 0,24 in)
Le (1kHz)
0,60 mH
Ref. Efficiency 1W At 1m (half space)
94,4 dB

Mounting information

Overall diameter
210 mm (8,27 in)
N. of mounting holes and bolt
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)
Net weight
3,4 kg (7,5 lb)
Shipping weight
3,72 kg (8,22 lb)
CardBoard Packaging dimensions
235 x 235 x 150 mm (9,25 x 9,25 x 5,91 in)