12MB700 - AV-iQ
12MB700
Very High Output Midbass Transducer
Key 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
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.
0221265220 16 Ohm
0221285220 8 Ohm
FERRITE LF-MB-MF TRANSDUCERS
General Description
info@eighteensound.com
www.eighteensound.com
FERRITE LF-MB-MF TRANSDUCERS
12MB700
Very High Output Midbass Transducer
NOMINAL DIAMETER
RATED IMPEDANCE
AES POWER (1)
PROGRAM POWER (2)
PEAK POWER (3)
SENSITIVITY (4)
FREQUENCY RANGE (5)
POWER COMPRESSION
@-10DB (6)
300 mm (12 in)
8 Ohm
450 W
600 W
1200 W
101,5 dB
60 ÷ 5000 Hz
0,4 dB
POWER COMPRESSION @-3DB
POWER COMPRESSION @FULL
POWER
1,5 dB
2,8 dB
MAX RECOMM. FREQUENCY
RECOMM. ENCLOSURE VOLUME
MINIMUM IMPEDANCE
MAX PEAK TO PEAK EXCURSION
VOICE COIL DIAMETER
VOICE COIL WINDING MATERIAL
SUSPENSION
CONE
4000 Hz
10 ÷ 80 lt. (0,3 ÷ 2,83 cuft)
5,7 Ohm at 25°C
22 mm (0,87 in)
75 mm (3 in)
aluminum
M-roll, Polycotton
Curvilinear, Paper
FREQUENCY RESPONSE CURVE OF 12MB700 MADE ON 50 LIT. ENCLOSURE TUNED 60HZ
IN FREE FIELD (4PI) ENVIRONMENT. ENCLOSURE CLOSES THE REAR OF THE DRIVER.
THE THIN LINE REPRESENTS 45 DEG. OFF AXIS FREQUENCY RESPONSE
FREE AIR IMPEDANCE MAGNITUDE CURVE
THIELE SMALL PARAMETERS (7)
Fs
Re
Sd
Qms
Qes
Qts
Vas
Mms
BL
Linear Mathematical Xmax (8)
Le (1kHz)
Ref. Efficiency 1W@1m (half
space)
49 Hz
5 Ohm
0,0531 sq.mt. (82,31 sq.in.)
4,7
0,2
0,19
101 lt. (3,57 cuft)
41 gr. (0,09 lb)101 lt. (3,57 cuft)
17,8 Tm
± 4,5 mm (± 0,18 in)
0,9 mH
99,6 dB
MOUNTING INFORMATIONS
Overall diameter
N. of mounting holes
Mounting holes diameter
Bolt circle diameter
Front mount baffle cutout ø
Rear mount baffle cutout ø
Total depth
Flange and gasket thickness
Net weight
Shipping weight
CardBoard Packaging
dimensions
315 mm (12,4 in)
8
7,15 mm (0,28 in)
296 - 300 mm (11,65 - 11,8 in)
282 mm (11,1 in)
282 mm (11,1 in)
147,5 mm (5,82 in)
16,5 mm (0,65 in)
8,0 kg (17,66 lb)
8,8 kg (19,43 lb)
332 x 332 x 184 mm (13,07 x 13,07 x
7,24 in)
NOTES
(1) AES power is determined according to AES2-1984 (r2003) standard
(2) Continuous power rating is measured in 50 lit enclosure tuned 60Hz using a 60 - 2000Hz
band limited pink noise test signal with 50% duty cycle, applied for 2 hours.
(3) The peak power rating represents the maximum permitted instantaneous peak power level
over a maximum period of 10ms which will be withstood by the loudspeaker without damage.
(4) Sensitivity represents the averaged value of acoustic output as measured on the forward
central axis of cone, at distance 1m from the baffle panel, when connected to 2,83V sine wave
test signal swept between 500Hz and 2500Hz with the test specimen mounted in the same
enclosure as given for (1) above.
(5) Frequency range is given as the band of frequencies delineated by the lower and upper
limits where the output level drops by 10 dB below the rated sensitivity in half space
environment.
(6) Power compression represents the loss of sensitivity for the specified power, measured from
50-500 Hz, after a 5 min pink noise preconditioning test at the specified power.
(7) Thiele - Small parameters are measured after the test specimen has been conditioned by
450 W AES power and represent the expected long term parameters after a short period of use.
(8) Linear Math. Xmax is calculated as (Hvc-Hg)/2+Hg/4 where Hvc is the coil depth and Hg is
the gap depth.
EIGHTEEN SOUND - Via dell'Industria 20 - 42025 Cavriago Italy - Tel. +39 0522 494402 - Fax +39 0522 494410
Eighteen Sound engages in research and product improvement. New materials and design refinements can be introduced into existing products without notice.
GENERAL SPECIFICATIONS
Version 26/03/2013
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