Beyma SM-212
Subwoofer
12″ / 300 mm
Nominal diameter
43 Hz
Resonance
0.38
Q factor
95 dB
Sensitivity
± 8.25 mm
Linear excursion
700 W
Program Power
Discontinued
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.5
dB
Frequency response
45 - 4000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
43.0
Hz
Mechanical quality factor
QMS
5.30
Electrical quality factor
QES
0.40
Total quality factor
QTS
0.38
Large signal parameters
Maximum linear excursion
xmax
8.25
mm
Maximum excursion before damage
xlim
13.5
mm
Air volume displaced at xmax
VD
454
cm³
Power handling
P
350
W
Program power
Pmax
700
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.5
Ω
Inductance (1kHz)
LE
0.6
mH
VC Diameter
64
mm
Winding height
HVC
19.5
mm
Magnet
Force factor
Bl
14.4
N/A
Motor constant
Bl/√RE
6.14
N/√W
Air gap height
HAG
7
mm
Material
Ferrite
Diaphragm
Effective diameter
265
mm
Effective area
SD
550
cm²
Moving mass
MMS
57
g
Moving mass (without air load)
MMD
48.3
g
Suspensions
Stiffness
KMS
4.17
N/mm
Compliance
CMS
240
µm/N
Equivalent volume to the compliance
VAS
103
L
Mechanical resistance
RMS
2.9
N·s/m
Dimensions
Nominal diameter
12
″
300
mm
Volume occupied by the driver (estimated)
2.0
L
Net weight
4.6
kg
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SpeakerbenchSimilar subwoofers to Beyma SM-212
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12″Mid-range
fS
43 Hz
SD
510 cm²
43 - 3000 Hz
QTS
0.41
xmax
2.0 mm
SPL1W
94 dB
Bl/√RE
5.53
Pmax
400 W
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12″Subwoofer
fS
42 Hz
SD
539 cm²
45 - 5000 Hz
QTS
0.37
xmax
7.4 mm
SPL1W
95 dB
Bl/√RE
5.86
Pmax
600 W
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12″Low frequency
fS
42 Hz
SD
540 cm²
50 - 3000 Hz
QTS
0.33
xmax
6.0 mm
SPL1W
95 dB
Bl/√RE
6.59
Pmax
800 W