Beyma 12WR400
Subwoofer
12″ / 300 mm
Nominal diameter
42 Hz
Resonance
0.27
Q factor
95 dB
Sensitivity
± 6.3 mm
Linear excursion
800 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.9
dB
Frequency response
45 - 5000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
42.0
Hz
Mechanical quality factor
QMS
5.60
Electrical quality factor
QES
0.28
Total quality factor
QTS
0.27
Large signal parameters
Maximum linear excursion
xmax
6.3
mm
Maximum excursion before damage
xlim
30.0
mm
Air volume displaced at xmax
VD
334
cm³
Power handling
P
400
W
Program power
Pmax
800
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.6
Ω
Inductance (1kHz)
LE
1.0
mH
VC Diameter
76
mm
Winding height
HVC
16
mm
Magnet
Force factor
Bl
18.0
N/A
Motor constant
Bl/√RE
7.61
N/√W
Air gap height
HAG
8
mm
Diaphragm
Effective diameter
260
mm
Effective area
SD
530
cm²
Moving mass
MMS
63
g
Moving mass (without air load)
MMD
54.3
g
Suspensions
Stiffness
KMS
4.39
N/mm
Compliance
CMS
228
µm/N
Equivalent volume to the compliance
VAS
91
L
Mechanical resistance
RMS
3.0
N·s/m
Dimensions
Nominal diameter
12
″
300
mm
Overall diameter
313
mm
Baffle cutout diameter
278
mm
Overall depth
131
mm
Volume occupied by the driver (estimated)
2.4
L
Net weight
5.5
kg
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fS
42 Hz
SD
550 cm²
40 - 20000 Hz
QTS
0.25
xmax
6.0 mm
SPL1W
95 dB
Bl/√RE
7.71
Pmax
800 W
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12″Woofer
fS
38 Hz
SD
495 cm²
40 - 5600 Hz
QTS
0.26
xmax
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SPL1W
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Bl/√RE
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fS
46 Hz
SD
545 cm²
63 - 2100 Hz
QTS
0.32
xmax
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SPL1W
95 dB
Bl/√RE
8.05
Pmax
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