MD Lab SW-ES12
Subwoofer
12″ / 314 mm
Nominal diameter
30 Hz
Resonance
0.65
Q factor
85 dB
Sensitivity
400 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
85.3
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
30.4
Hz
Mechanical quality factor
QMS
2.02
Electrical quality factor
QES
0.95
Total quality factor
QTS
0.65
Large signal parameters
Power handling
P
200
W
Program power
Pmax
400
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.8
Ω
Inductance (1kHz, estimated)
LE
0.98
mH
Magnet
Force factor
Bl
9.63
N/A
Motor constant
Bl/√RE
4.94
N/√W
Diaphragm
Effective diameter
250
mm
Effective area
SD
491
cm²
Moving mass
MMS
121.3
g
Moving mass (without air load)
MMD
113.3
g
Suspensions
Stiffness
KMS
4.43
N/mm
Compliance
CMS
226
µm/N
Equivalent volume to the compliance
VAS
77.4
L
Mechanical resistance
RMS
11.48
N·s/m
Dimensions
Nominal diameter
12
″
314
mm
Overall diameter
314
mm
Baffle cutout diameter
283
mm
Overall depth
102
mm
Flange thickness
30
mm
Mounting depth
72
mm
Volume occupied by the driver (estimated)
1.6
L
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fS
29 Hz
SD
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29 - 300 Hz
QTS
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xmax
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SPL1W
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Bl/√RE
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fS
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SD
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fS
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SD
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35 - 600 Hz
QTS
0.66
xmax
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Bl/√RE
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