BMS 15N820
Subwoofer
15″ / 388 mm
Nominal diameter
39 Hz
Resonance
0.26
Q factor
97 dB
Sensitivity
± 4.5 mm
Linear excursion
1800 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
97.1
dB
Frequency response
40 - 2500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
39.2
Hz
Mechanical quality factor
QMS
4.50
Electrical quality factor
QES
0.27
Total quality factor
QTS
0.26
Large signal parameters
Maximum linear excursion
xmax
4.5
mm
Air volume displaced at xmax
VD
396
cm³
Power handling
P
900
W
Program power
Pmax
1800
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.7
Ω
Inductance (1kHz)
LE
0.81
mH
VC Diameter
102
mm
Winding height
HVC
19
mm
Winding material
Copper
Magnet
Force factor
Bl
24.2
N/A
Motor constant
Bl/√RE
10.1
N/√W
Air gap height
HAG
10
mm
Material
Neodymium
Diaphragm
Effective diameter
335
mm
Effective area
SD
880
cm²
Moving mass
MMS
114
g
Moving mass (without air load)
MMD
96
g
Suspensions
Stiffness
KMS
6.94
N/mm
Compliance
CMS
144
µm/N
Equivalent volume to the compliance
VAS
159
L
Mechanical resistance
RMS
6.24
N·s/m
Dimensions
Nominal diameter
15
″
388
mm
Overall diameter
388
mm
Baffle cutout diameter
358
mm
Overall depth
184
mm
Volume occupied by the driver (estimated)
3.5
L
Net weight
5.7
kg
Frame material
Cast Aluminum
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SD
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