18 Sound 12MB700 Very High Output Mid-Bass Ferrite Transducer 450 W 8 ohm, 1 pc

Description

18 Sound 12MB700 Very High Output Mid-Bass Ferrite Transducer 450 W 8 ohm, 1 pc
Product Features
101,5 dB SPL 1W / 1m sensitivity
75 mm (3 in) Interleaved Sandwich Voice coil (ISV)
450 W AES power handling
Double Demodulating Rings (DDR) for lower distortion
Improved heat dissipation via unique basket design
Weather protected cone and plates for outdoor usage
Ideal for compact two way and multiway systems
Product Description
The 12MB700 is a very high sensitivity (101.5 dB 1W/1m) midbass driver with high power handling capabilities. The 12MB700 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. Its curvilinear paper cone made from a special high strength wood pulp, has been 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 of a linen-like material, which is more resistant to aging and fatigue than traditional materials. The 75 mm diameter state-of-the-art voice coil is similiar to those fitted to our top-of-the-range 18" and 15" models but it is wound with aluminum wire. It employs our 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.
The excellent performance capabilities of this loudspeaker are further enhanced by the Double Demodulating Rings (DDR) designed to dramatically reduce the intermodulation and harmonic distortion and improve transient response. The magnetic structure has been optimized using FEA CAD resource, maximizing the flux density in the voice coil gap. Voice coil cooling has been achieved by incorporating airways between the chassis back plate and the top plate of the magnet, allowing heated air from the voice coil and gap to be channeled away and dissipated by the chassis basket.
Due to the increasing use of high power audio systems at outdoor events or in marine environments, the ability to perform properly under inclement weather conditions is a key feature in Eighteen Sound philosophy. Hence, an exclusive treatment has been applied to the cone giving it water repellent properties. In addition, another special treatment has been applied to the top and back plates making the transducer far more resistant to the corrosive effects of salts and oxidization.
General Specifications
Nominal Diameter
300 mm (12 in)
Rated Impedance
8 Ohm
AES Power
450 W
Program Power
600 W
Peak Power
1200 W
Sensitivity
101,5 dB
Frequency Range
60 - 5000 Hz
Power Compression -10dB
0,4 dB
Power Compression -3dB
1,5 dB
Power Compression Full Power
2,8 dB
Max Recomm. Frequency
4000 Hz
Recomm. Enclosure Volume
10 - 80 lt. (0,3 - 2,83 cuft)
Minimum Impedance
5,7 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
49 Hz
Re
5 Ohm
Sd
0,0531 sq.mt. (82,31 sq.in.)
Qms
4,7
Qes
0,2
Qts
0,19
Vas
101 lt. (3,57 cuft)
Mms
41 gr. (0,09 lb)101 lt. (3,57 cuft)
BL
17,8 Tm
Linear Mathematical Xmax
± 4,5 mm (± 0,18 in)
Le (1kHz)
0,9 mH
Ref. Efficiency 1W-1m (half space)
99,6 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 kg (17,66 lb)
Shipping weight
9 kg (19,84 lb)
Packaging Dimensions
13 x 13 x 7.24"