BMS 12C382
Coaxial
12″ / 318 mm
Nominal diameter
52 Hz
Resonance
0.29
Q factor
96 dB
Sensitivity
± 4.5 mm
Linear excursion
1000 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
95.6
dB
Frequency response
45 - 20000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
52.0
Hz
Mechanical quality factor
QMS
5.60
Electrical quality factor
QES
0.30
Total quality factor
QTS
0.29
Large signal parameters
Maximum linear excursion
xmax
4.5
mm
Air volume displaced at xmax
VD
219
cm³
Power handling
P
500
W
Program power
Pmax
1000
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.8
Ω
Inductance (1kHz)
LE
0.9
mH
VC Diameter
77
mm
Winding height
HVC
19
mm
Winding material
Copper
Former material
Kapton
Magnet
Flux density
B
1.8
T
Force factor
Bl
18.6
N/A
Motor constant
Bl/√RE
7.72
N/√W
Air gap height
HAG
10
mm
Material
Ceramic
Diaphragm
Effective diameter
249
mm
Effective area
SD
487
cm²
Moving mass
MMS
55
g
Moving mass (without air load)
MMD
47
g
Material
Polyester
Suspensions
Stiffness
KMS
5.88
N/mm
Compliance
CMS
170
µm/N
Equivalent volume to the compliance
VAS
57
L
Mechanical resistance
RMS
3.21
N·s/m
Dimensions
Nominal diameter
12
″
318
mm
Overall diameter
318
mm
Baffle cutout diameter
285
mm
Overall depth
166
mm
Volume occupied by the driver (estimated)
3.5
L
Net weight
7.75
kg
Frame material
Cast Aluminum
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12″Subwoofer
fS
51 Hz
SD
550 cm²
55 - 4000 Hz
QTS
0.27
xmax
7.0 mm
SPL1W
96 dB
Bl/√RE
8.78
Pmax
1400 W
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12″Woofer
fS
50 Hz
SD
531 cm²
50 - 3000 Hz
QTS
0.25
xmax
7.2 mm
SPL1W
96 dB
Bl/√RE
8.31
Pmax
1000 W
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12″Woofer
fS
49 Hz
SD
530 cm²
50 - 3000 Hz
QTS
0.26
xmax
7.0 mm
SPL1W
96 dB
Bl/√RE
8.17
Pmax
1000 W