Focal K2 POWER E 30 KX
Subwoofer
12″ / 305 mm
Nominal diameter
29 Hz
Resonance
0.46
Q factor
87 dB
Sensitivity
± 22.5 mm
Linear excursion
1600 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
86.7
dB
Frequency response
20 - 500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
29.0
Hz
Mechanical quality factor
QMS
6.10
Electrical quality factor
QES
0.49
Total quality factor
QTS
0.46
Large signal parameters
Maximum linear excursion
xmax
22.5
mm
Air volume displaced at xmax
VD
1130
cm³
Power handling
P
800
W
Program power
Pmax
1600
W
Voice Coil
Nominal impedance
Z
2 x 4
Ω
DC resistance (in series)
RE
6.4
Ω
Inductance (1kHz, in series, estimated)
LE
2.13
mH
VC Diameter
65
mm
Winding material
Copper Clad Aluminium
Former material
Glass fiber
Magnet
Force factor (in series)
Bl
21.3
N/A
Motor constant
Bl/√RE
8.42
N/√W
Diameter
170
mm
Diaphragm
Effective diameter
253
mm
Effective area
SD
502
cm²
Moving mass
MMS
183
g
Moving mass (without air load)
MMD
175
g
Material
Kevlar Sandwich
Suspensions
Stiffness
KMS
6.67
N/mm
Compliance
CMS
150
µm/N
Equivalent volume to the compliance
VAS
50
L
Mechanical resistance
RMS
5.47
N·s/m
Surround material
Butyl
Dimensions
Nominal diameter
12
″
305
mm
Baffle cutout diameter
283
mm
Mounting depth
172
mm
Volume occupied by the driver
4.0
L
Net weight
11.2
kg
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fS
29 Hz
SD
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25 - 500 Hz
QTS
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xmax
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SPL1W
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Bl/√RE
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Pmax
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fS
30 Hz
SD
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QTS
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xmax
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Bl/√RE
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fS
29 Hz
SD
491 cm²
29 - 450 Hz
QTS
0.40
xmax
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SPL1W
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Bl/√RE
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Pmax
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