Eighteen Sound 12MB1000
Mid Bass
12″ / 315 mm
Nominal diameter
54 Hz
Resonance
0.18
Q factor
98 dB
Sensitivity
± 2.5 mm
Linear excursion
800 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
97.9
dB
Frequency response
80 - 3500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
54.0
Hz
Mechanical quality factor
QMS
6.00
Electrical quality factor
QES
0.20
Total quality factor
QTS
0.18
Large signal parameters
Maximum linear excursion
xmax
2.5
mm
Air volume displaced at xmax
VD
133
cm³
Power handling
P
600
W
Program power
Pmax
800
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.8
Ω
Inductance (1kHz)
LE
1.46
mH
VC Diameter
100
mm
Magnet
Force factor
Bl
23.5
N/A
Motor constant
Bl/√RE
9.76
N/√W
Diaphragm
Effective diameter
260
mm
Effective area
SD
531
cm²
Moving mass
MMS
55.5
g
Moving mass (without air load)
MMD
46.7
g
Suspensions
Stiffness
KMS
6.37
N/mm
Compliance
CMS
157
µm/N
Equivalent volume to the compliance
VAS
60
L
Mechanical resistance
RMS
3.14
N·s/m
Dimensions
Nominal diameter
12
″
315
mm
Overall diameter
315
mm
Baffle cutout diameter
282
mm
Overall depth
118
mm
Flange thickness
16
mm
Mounting depth
102
mm
Volume occupied by the driver (estimated)
3.2
L
Net weight
9.6
kg
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12″Woofer
fS
50 Hz
SD
522 cm²
50 - 2000 Hz
QTS
0.19
xmax
6.0 mm
SPL1W
98 dB
Bl/√RE
9.37
Pmax
800 W
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