BMS 12N620
Subwoofer
12″ / 318 mm
Nominal diameter
45 Hz
Resonance
0.25
Q factor
96 dB
Sensitivity
± 5.5 mm
Linear excursion
1000 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
95.8
dB
Frequency response
45 - 2500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
44.7
Hz
Mechanical quality factor
QMS
5.10
Electrical quality factor
QES
0.26
Total quality factor
QTS
0.25
Large signal parameters
Maximum linear excursion
xmax
5.5
mm
Air volume displaced at xmax
VD
292
cm³
Power handling
P
500
W
Program power
Pmax
1000
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.7
Ω
Inductance (1kHz)
LE
0.6
mH
VC Diameter
77
mm
Winding height
HVC
19
mm
Winding material
Copper
Magnet
Force factor
Bl
20.6
N/A
Motor constant
Bl/√RE
8.63
N/√W
Air gap height
HAG
8
mm
Material
Neodymium
Diaphragm
Effective diameter
260
mm
Effective area
SD
531
cm²
Moving mass
MMS
68
g
Moving mass (without air load)
MMD
59.2
g
Suspensions
Stiffness
KMS
5.56
N/mm
Compliance
CMS
180
µm/N
Equivalent volume to the compliance
VAS
72.7
L
Mechanical resistance
RMS
3.74
N·s/m
Dimensions
Nominal diameter
12
″
318
mm
Overall diameter
318
mm
Baffle cutout diameter
284
mm
Overall depth
145
mm
Volume occupied by the driver (estimated)
1.9
L
Net weight
3.5
kg
Frame material
Cast Aluminum
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fS
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SD
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100 - 6000 Hz
QTS
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SPL1W
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Bl/√RE
8.81
Pmax
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fS
47 Hz
SD
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50 - 2500 Hz
QTS
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fS
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SD
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40 - 2000 Hz
QTS
0.27
xmax
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SPL1W
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Bl/√RE
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