BMS 12S330
Subwoofer
12″ / 318 mm
Nominal diameter
29 Hz
Resonance
0.24
Q factor
91 dB
Sensitivity
± 8 mm
Linear excursion
1200 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
90.6
dB
Frequency response
25 - 300
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
28.6
Hz
Mechanical quality factor
QMS
5.90
Electrical quality factor
QES
0.25
Total quality factor
QTS
0.24
Large signal parameters
Maximum linear excursion
xmax
8.0
mm
Air volume displaced at xmax
VD
398
cm³
Power handling
P
600
W
Program power
Pmax
1200
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.0
Ω
Inductance (1kHz)
LE
0.7
mH
VC Diameter
77
mm
Winding height
HVC
26
mm
Winding material
Copper
Magnet
Force factor
Bl
23.0
N/A
Motor constant
Bl/√RE
9.39
N/√W
Air gap height
HAG
10
mm
Material
Ferrite
Diaphragm
Effective diameter
252
mm
Effective area
SD
498
cm²
Moving mass
MMS
127
g
Moving mass (without air load)
MMD
118.8
g
Suspensions
Stiffness
KMS
4.17
N/mm
Compliance
CMS
240
µm/N
Equivalent volume to the compliance
VAS
85.5
L
Mechanical resistance
RMS
3.87
N·s/m
Dimensions
Nominal diameter
12
″
318
mm
Overall diameter
318
mm
Baffle cutout diameter
284
mm
Overall depth
171
mm
Volume occupied by the driver (estimated)
4.0
L
Net weight
9.4
kg
Frame material
Cast Aluminum
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SD
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SPL1W
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SD
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SD
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QTS
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xmax
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