12MB600 High Output MB Ferrite Transducer

Eighteen Sound - 12MB600 High Output MB Ferrite Transducer

Code: 18-12mb600-8


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Product Description

12MB600 High Output MB Ferrite Transducer

Key Features

  • 101 dB SPL 1W / 1m average sensitivity
  • 75 mm (3 in) Interleaved Sandwich Voice coil (ISV)
  • 450 W AES power handling
  • Weather protected cone and plates for outdoor usage
  • Excellent transient response
  • Improved heat dissipation via unique basket design
  • Ideal for compact two way and multiway systems

The 12MB600 is a high sensitivity (101dB 1W/1m) midbass driver with high power handling capabilities. It can be used as either a bass/mid driver in compact 2-way reflex enclosures or as a direct radiating or horn loaded, dedicated midrange driver, in multi-way touring and fixed installation concert and arena systems. The curvilinear paper cone is made with a special high strength wood pulp designed to achieve the best possible linearity within its intended frequency range and to control bell-mode resonances around the cone circumference. The cone is carried by a multiroll suspension formed from a linen-like material which is more resistant to aging and fatigue than traditional materials. The 75 mm aluminum wire voice coil employs the Interleaved Sandwich Voice coil (ISV) technology, in which a high strength fiberglas former carries windings on both the outer and inner surfaces to achieve a mass balanced coil. This results in an extremely linear motor assembly with a reduced tendency for eccentric behavior when driven hard. Voice coil cooling has been achieved by incorporating airways between the chassis back plate and the top plate of the magnet which allow heated air from the voice coil and gap to be channeled away and dissipated by the chassis basket. The magnetic structure has been optimized using FEACAD resource which has maximized the flux density in the voice coil gap. The ability to perform properly under inclement weather conditions is a feature in Eighteen Sound's philosophy. Hence, an exclusive treatment is applied to the cone giving it water repellent properties. In addition, another special treatment is applied to the top and back plates making the transducer far more resistant to the corrosive effects of salts and oxidization.


Nominal Diameter 300 mm (12 in)
Rated Impedance 8 Ohm
AES Power 450 W
Program Power 600 W
Peak Power 1200 W
Sensitivity 101 dB
Frequency Range 58 - 5000 Hz
Power Compression @-10dB 0,5 dB
Power Compression @-3dB 1,6 dB
Power Compression @Full Power 3,0 dB
Max Recomm. Frequency 2200 Hz
Recomm. Enclosure Volume 30 - 80 lt. (1,06 - 2,83 cuft)
Minimum Impedance 6,5 Ohm at 25°C
Max Peak To Peak Excursion 22 mm (0,87 in)
Voice Coil Diameter 75 mm (3 in)
Voice Coil winding material aluminum
Suspension M-roll, Polycotton
Cone Curvilinear, Paper

Thiele Small Parameters

Fs 44 Hz
Re 5 Ohm
Sd 0,0531 sq.mt. (82,31 sq.in.)
Qms 3,9
Qes 0,19
Qts 0,18
Vas 115 lt. (4,06 cuft)
Mms 43 gr. (0,09 lb)
BL 18 Tm
Linear Mathematical Xmax ± 4,5 mm (± 0,18 in)
Le (1kHz) 1,32 mH
Ref. Efficiency 1W@1m (half space) 99,2 dB

Mounting information

Overall diameter 315 mm (12,4 in)
N. of mounting holes and bolt 8
Mounting holes diameter 7,15 mm (0,28 in)
Bolt circle diameter 296 - 300 mm (11,65 - 11,8 in)
Front mount baffle cutout ø 282 mm (11,1 in)
Rear mount baffle cutout ø 282 mm (11,1 in)
Total depth 147,5 mm (5,82 in)
Flange and gasket thickness 16,5 mm (0,65 in)
Net weight 8,0 kg (17,66 lb)
Shipping weight 8,8 kg (19,43 lb)
Packaging Dimensions 8,8 kg (19,43 lb)