Eminence BETA-12LTA
Woofer
12″ / 305 mm
Nominal diameter
45 Hz
Resonance
0.51
Q factor
95 dB
Sensitivity
± 3.2 mm
Linear excursion
450 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
95.3
dB
Frequency response
48 - 8000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
45.0
Hz
Mechanical quality factor
QMS
6.44
Electrical quality factor
QES
0.55
Total quality factor
QTS
0.51
Large signal parameters
Maximum linear excursion
xmax
3.2
mm
Maximum excursion before damage
xlim
8.0
mm
Air volume displaced at xmax
VD
170
cm³
Power handling
P
225
W
Program power
Pmax
450
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
7.4
Ω
Inductance (1kHz)
LE
0.83
mH
VC Diameter
51
mm
Winding material
Copper
Former material
Polyimide
Magnet
Force factor
Bl
11.7
N/A
Motor constant
Bl/√RE
4.31
N/√W
Air gap height
HAG
7.9
mm
Weight
1.077
kg
Material
Ferrite
Diaphragm
Effective diameter
260
mm
Effective area
SD
532
cm²
Moving mass
MMS
36
g
Moving mass (without air load)
MMD
27.4
g
Material
Paper
Suspensions
Stiffness
KMS
2.94
N/mm
Compliance
CMS
340
µm/N
Equivalent volume to the compliance
VAS
136
L
Mechanical resistance
RMS
1.58
N·s/m
Surround material
Cloth
Dimensions
Nominal diameter
12
″
305
mm
Overall diameter
306
mm
Baffle cutout diameter
281
mm
Overall depth
114
mm
Volume occupied by the driver
2.0
L
Net weight
3.67
kg
Frame material
Pressed steel
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fS
46 Hz
SD
855 cm²
45 - 3000 Hz
QTS
0.50
xmax
4.7 mm
SPL1W
95 dB
Bl/√RE
6.83
Pmax
500 W
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SD
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QTS
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xmax
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fS
46 Hz
SD
880 cm²
50 - 4000 Hz
QTS
0.48
xmax
8.0 mm
SPL1W
95 dB
Bl/√RE
7.44
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