Beyma 12CMV2
Subwoofer
12″ / 300 mm
Nominal diameter
49 Hz
Resonance
0.47
Q factor
94 dB
Sensitivity
± 7 mm
Linear excursion
640 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
93.5
dB
Frequency response
50 - 6000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
49.0
Hz
Mechanical quality factor
QMS
3.90
Electrical quality factor
QES
0.54
Total quality factor
QTS
0.47
Large signal parameters
Maximum linear excursion
xmax
7.0
mm
Maximum excursion before damage
xlim
29.0
mm
Air volume displaced at xmax
VD
371
cm³
Power handling
P
320
W
Program power
Pmax
640
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.0
Ω
Inductance (1kHz)
LE
1.0
mH
VC Diameter
64
mm
Winding height
HVC
17
mm
Magnet
Force factor
Bl
13.7
N/A
Motor constant
Bl/√RE
5.59
N/√W
Air gap height
HAG
7
mm
Diaphragm
Effective diameter
260
mm
Effective area
SD
530
cm²
Moving mass
MMS
54
g
Moving mass (without air load)
MMD
45.4
g
Suspensions
Stiffness
KMS
5.18
N/mm
Compliance
CMS
193
µm/N
Equivalent volume to the compliance
VAS
76
L
Mechanical resistance
RMS
4.2
N·s/m
Dimensions
Nominal diameter
12
″
300
mm
Overall diameter
310
mm
Baffle cutout diameter
280
mm
Overall depth
130
mm
Volume occupied by the driver (estimated)
2.1
L
Net weight
4.6
kg
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fS
47 Hz
SD
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QTS
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xmax
5.5 mm
SPL1W
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Bl/√RE
6.13
Pmax
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12″Subwoofer
fS
47 Hz
SD
543 cm²
50 - 4000 Hz
QTS
0.44
xmax
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SPL1W
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Bl/√RE
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fS
51 Hz
SD
507 cm²
44 - 3000 Hz
QTS
0.47
xmax
4.8 mm
SPL1W
94 dB
Bl/√RE
5.73
Pmax
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