BMS 15N840
Subwoofer
15″ / 388 mm
Nominal diameter
36 Hz
Resonance
0.3
Q factor
96 dB
Sensitivity
± 11 mm
Linear excursion
2400 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
95.6
dB
Frequency response
22 - 300
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
35.6
Hz
Mechanical quality factor
QMS
5.75
Electrical quality factor
QES
0.32
Total quality factor
QTS
0.30
Large signal parameters
Maximum linear excursion
xmax
11.0
mm
Air volume displaced at xmax
VD
930
cm³
Power handling
P
1200
W
Program power
Pmax
2400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.0
Ω
Inductance (1kHz)
LE
0.82
mH
VC Diameter
102
mm
Winding height
HVC
32
mm
Winding material
Copper
Magnet
Force factor
Bl
24.6
N/A
Motor constant
Bl/√RE
11.0
N/√W
Air gap height
HAG
10
mm
Material
Neodymium
Diaphragm
Effective diameter
330
mm
Effective area
SD
845
cm²
Moving mass
MMS
137
g
Moving mass (without air load)
MMD
119.8
g
Suspensions
Stiffness
KMS
6.85
N/mm
Compliance
CMS
146
µm/N
Equivalent volume to the compliance
VAS
146
L
Mechanical resistance
RMS
5.33
N·s/m
Dimensions
Nominal diameter
15
″
388
mm
Overall diameter
388
mm
Baffle cutout diameter
358
mm
Overall depth
194
mm
Volume occupied by the driver (estimated)
4.0
L
Net weight
6.8
kg
Frame material
Cast Aluminum
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fS
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SD
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57 - 2800 Hz
QTS
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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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40 - 5600 Hz
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SPL1W
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