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
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
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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
Eminence KAPPA-12A SPL & Impedance

Export this driver to a simulation software:

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