Beyma 12G40
Subwoofer
12″ / 300 mm
Nominal diameter
44 Hz
Resonance
0.29
Q factor
95 dB
Sensitivity
± 7 mm
Linear excursion
1000 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.9
dB
Frequency response
45 - 4000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
44.0
Hz
Mechanical quality factor
QMS
11.60
Electrical quality factor
QES
0.30
Total quality factor
QTS
0.29
Large signal parameters
Maximum linear excursion
xmax
7.0
mm
Maximum excursion before damage
xlim
28.0
mm
Air volume displaced at xmax
VD
371
cm³
Power handling
P
500
W
Program power
Pmax
1000
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.0
Ω
Inductance (1kHz)
LE
2.1
mH
VC Diameter
76
mm
Winding height
HVC
17.5
mm
Magnet
Force factor
Bl
18.4
N/A
Motor constant
Bl/√RE
7.51
N/√W
Air gap height
HAG
8
mm
Diaphragm
Effective diameter
260
mm
Effective area
SD
530
cm²
Moving mass
MMS
62
g
Moving mass (without air load)
MMD
53.3
g
Suspensions
Stiffness
KMS
4.85
N/mm
Compliance
CMS
206
µm/N
Equivalent volume to the compliance
VAS
81
L
Mechanical resistance
RMS
1.5
N·s/m
Dimensions
Nominal diameter
12
″
300
mm
Overall diameter
312
mm
Baffle cutout diameter
278
mm
Overall depth
133
mm
Volume occupied by the driver (estimated)
2.8
L
Net weight
7.1
kg
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fS
45 Hz
SD
855 cm²
45 - 2000 Hz
QTS
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xmax
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SPL1W
95 dB
Bl/√RE
12
Pmax
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fS
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SD
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37 - 2300 Hz
QTS
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xmax
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fS
42 Hz
SD
530 cm²
45 - 5000 Hz
QTS
0.30
xmax
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SPL1W
95 dB
Bl/√RE
7.35
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