BMS 12N804
Subwoofer
12″ / 318 mm
Nominal diameter
39 Hz
Resonance
0.29
Q factor
93 dB
Sensitivity
± 8 mm
Linear excursion
2200 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
93.0
dB
Frequency response
40 - 1700
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
39.0
Hz
Mechanical quality factor
QMS
4.60
Electrical quality factor
QES
0.31
Total quality factor
QTS
0.29
Large signal parameters
Maximum linear excursion
xmax
8.0
mm
Air volume displaced at xmax
VD
425
cm³
Power handling
P
1100
W
Program power
Pmax
2200
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.7
Ω
Inductance (1kHz)
LE
0.66
mH
VC Diameter
102
mm
Winding height
HVC
26
mm
Winding material
Copper
Magnet
Force factor
Bl
20.4
N/A
Motor constant
Bl/√RE
8.54
N/√W
Air gap height
HAG
10
mm
Material
Neodymium
Diaphragm
Effective diameter
260
mm
Effective area
SD
531
cm²
Moving mass
MMS
92
g
Moving mass (without air load)
MMD
83.2
g
Suspensions
Stiffness
KMS
5.56
N/mm
Compliance
CMS
180
µm/N
Equivalent volume to the compliance
VAS
71
L
Mechanical resistance
RMS
4.9
N·s/m
Dimensions
Nominal diameter
12
″
318
mm
Overall diameter
318
mm
Baffle cutout diameter
283
mm
Overall depth
151
mm
Volume occupied by the driver (estimated)
2.5
L
Net weight
5.1
kg
Frame material
Cast Aluminum
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SD
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SD
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