BMS 12C262
Coaxial
12″ / 318 mm
Nominal diameter
47 Hz
Resonance
0.24
Q factor
95 dB
Sensitivity
± 2.5 mm
Linear excursion
800 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
95.4
dB
Frequency response
55 - 2000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
47.3
Hz
Mechanical quality factor
QMS
5.40
Electrical quality factor
QES
0.25
Total quality factor
QTS
0.24
Large signal parameters
Maximum linear excursion
xmax
2.5
mm
Air volume displaced at xmax
VD
122
cm³
Power handling
P
400
W
Program power
Pmax
800
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.7
Ω
Inductance (1kHz, estimated)
LE
0.98
mH
VC Diameter
77
mm
Winding height
HVC
15
mm
Winding material
Copper
Former material
Kapton
Magnet
Flux density
B
1.9
T
Force factor
Bl
20.6
N/A
Motor constant
Bl/√RE
8.63
N/√W
Air gap height
HAG
10
mm
Material
Ceramic
Diaphragm
Effective diameter
249
mm
Effective area
SD
487
cm²
Moving mass
MMS
63
g
Moving mass (without air load)
MMD
55
g
Material
Polyester
Suspensions
Stiffness
KMS
5.56
N/mm
Compliance
CMS
180
µm/N
Equivalent volume to the compliance
VAS
60.6
L
Mechanical resistance
RMS
3.47
N·s/m
Dimensions
Nominal diameter
12
″
318
mm
Overall diameter
318
mm
Baffle cutout diameter
284
mm
Overall depth
179
mm
Volume occupied by the driver (estimated)
3.7
L
Net weight
7.8
kg
Frame material
Cast Aluminum
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fS
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SD
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QTS
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xmax
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SPL1W
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Bl/√RE
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Pmax
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fS
46 Hz
SD
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QTS
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xmax
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SPL1W
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12″Coaxial
fS
46 Hz
SD
487 cm²
50 - 20000 Hz
QTS
0.26
xmax
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SPL1W
95 dB
Bl/√RE
8.63
Pmax
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