Data Sheet

12MB1000
High Output Midbass Transducer
FERRITE LF-MB-MF TRANSDUCERS
Eighteen Sound engages in research and product improvement. New materials and design refinements can be introduced into existing products without notice.
EIGHTEEN SOUND - Via dell'Industria 20 - 42025 Cavriago Italy - Tel. [phone] - Fax [phone]
Version 21/06/2010
GENERAL SPECIFICATIONS
NOMINAL DIAMETER 300 mm (12 in)
RATED IMPEDANCE 8 Ohm
AES POWER 600 W
PROGRAM POWER (1) 800 W
PEAK POWER (2) 1600 W
SENSITIVITY (3) 102 dB
FREQUENCY RANGE (4) 80 ÷ 3500 Hz
POWER COMPRESSION
@-10DB (5)
0,5 dB
POWER COMPRESSION @-3DB 1,5 dB
POWER COMPRESSION @FULL
POWER
2,1 dB
MAX RECOMM. FREQUENCY 2500 Hz
RECOMM. ENCLOSURE VOLUME 8 ÷ 60 lt. (0,28 ÷ 2,12 cuft)
MINIMUM IMPEDANCE 7,2 Ohm at 25°C
MAX PEAK TO PEAK EXCURSION 20 mm (0,79 in)
VOICE COIL DIAMETER 100 mm (4 in)
VOICE COIL WINDING MATERIAL copper
SUSPENSION M-roll, Polycotton
CONE Curvilinear, Treated paper
THIELE SMALL PARAMETERS (6)
Fs 54 Hz
Re 5,8 Ohm
Sd 0,0531 sq.mt. (82,31 sq.in.)
Qms 6
Qes 0,2
Qts 0,18
Vas 60 lt. (2,12 cuft)
Mms 55,5 gr. (0,12 lb)
BL 23,5 Tm
Linear Mathematical Xmax (7) ± 2,5mm (±0,10 in)
Le (1kHz) 1,46 mH
Ref. Efficiency 1W@1m (half
space)
99 dB
MOUNTING INFORMATIONS
Overall diameter 315 mm (12,4 in)
N. of mounting holes 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 118,4 mm (4,66 in)
Flange and gasket thickness 16,5 mm (0,65 in)
Net weight 9,6 kg (21,19 lb)
Shipping weight 10,3 kg (22,74 lb)
CardBoard Packaging
dimensions
332 x 332 x 184 mm (13,07 x 13,07 x
7,24 in)
FREQUENCY RESPONSE CURVE OF 12MB1000 MADE ON 50 LIT. CLOSED BOX
ENCLOSURE 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
NOTES
(1) Continuous power rating is measured in 50 lit closed box using a 60 - 2000Hz band limited
pink noise test signal with 50% duty cycle, applied for 2 hours.
(2) 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.
(3) 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.
(4) 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.
(5) 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.
(6) Thiele - Small parameters are measured after the test specimen has been conditioned by
600 W AES power and represent the expected long term parameters after a short period of use.
(7) Linear Math. Xmax is calculated as (Hvc-Hg)/2 + Hg/4 where Hvc is the coil depth and Hg is
the gap depth.