Eminence KAPPA-12A
Woofer
12″ / 305 mm
Nominal diameter
45 Hz
Resonance
0.27
Q factor
97 dB
Sensitivity
± 3.2 mm
Linear excursion
900 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
96.9
dB
Frequency response
62 - 4200
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
45.0
Hz
Mechanical quality factor
QMS
7.76
Electrical quality factor
QES
0.28
Total quality factor
QTS
0.27
Large signal parameters
Maximum linear excursion
xmax
3.2
mm
Maximum excursion before damage
xlim
11.5
mm
Air volume displaced at xmax
VD
166
cm³
Power handling
P
450
W
Program power
Pmax
900
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.4
Ω
Inductance (1kHz)
LE
0.77
mH
VC Diameter
76
mm
Winding material
Aluminum
Former material
Polyimide
Magnet
Force factor
Bl
15.2
N/A
Motor constant
Bl/√RE
6.53
N/√W
Air gap height
HAG
9.5
mm
Weight
2.268
kg
Material
Ferrite
Diaphragm
Effective diameter
257
mm
Effective area
SD
520
cm²
Moving mass
MMS
42
g
Moving mass (without air load)
MMD
33.5
g
Material
Paper
Suspensions
Stiffness
KMS
3.33
N/mm
Compliance
CMS
300
µm/N
Equivalent volume to the compliance
VAS
112
L
Mechanical resistance
RMS
1.53
N·s/m
Surround material
Cloth
Dimensions
Nominal diameter
12
″
305
mm
Overall diameter
311
mm
Baffle cutout diameter
279
mm
Overall depth
143
mm
Volume occupied by the driver
2.55
L
Net weight
6.76
kg
Frame material
Pressed steel
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fS
45 Hz
SD
908 cm²
40 - 2000 Hz
QTS
0.27
xmax
7.7 mm
SPL1W
98 dB
Bl/√RE
12
Pmax
1000 W
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12″Full-range
fS
47 Hz
SD
510 cm²
47 - 15000 Hz
QTS
0.28
xmax
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SPL1W
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Bl/√RE
6.15
Pmax
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