Focal K2 POWER M 3 KM
Mid-range
3″ / 80 mm
Nominal diameter
170 Hz
Resonance
0.65
Q factor
86 dB
Sensitivity
120 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
85.5
dB
Frequency response
200 - 9000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
170
Hz
Mechanical quality factor
QMS
7.00
Electrical quality factor
QES
0.72
Total quality factor
QTS
0.65
Large signal parameters
Power handling
P
60
W
Program power
Pmax
120
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.0
Ω
Inductance (1kHz, estimated)
LE
0.09
mH
VC Diameter
35
mm
Magnet
Force factor
Bl
4.0
N/A
Motor constant
Bl/√RE
2.31
N/√W
Diameter
47
mm
Diaphragm
Effective diameter
62
mm
Effective area
SD
30
cm²
Moving mass
MMS
3.4
g
Moving mass (without air load)
MMD
3.3
g
Material
Kevlar Sandwich
Suspensions
Stiffness
KMS
2.5
N/mm
Compliance
CMS
400
µm/N
Equivalent volume to the compliance
VAS
0.3
L
Mechanical resistance
RMS
0.52
N·s/m
Surround material
TMD
Dimensions
Nominal diameter
3
″
80
mm
Overall diameter
80
mm
Baffle cutout diameter
66
mm
Mounting depth
27
mm
Net weight
0.2
kg
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Similar speaker drivers to Focal 3 KM
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3″Full-range
fS
133 Hz
SD
30 cm²
135 - 20000 Hz
QTS
0.51
xmax
2.0 mm
SPL1W
87 dB
Bl/√RE
1.87
Pmax
60 W
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2″Mid-range
fS
165 Hz
SD
15 cm²
400 - 20000 Hz
QTS
0.52
xmax
1.0 mm
SPL1W
82 dB
Bl/√RE
1.48
Pmax
120 W