Focal K2 POWER M 6.5 KM
Woofer
6.5″ / 165 mm
Nominal diameter
76 Hz
Resonance
0.77
Q factor
88 dB
Sensitivity
240 W
Program Power
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Sensitivity (1W, 1m, infinite baffle)
SPL1W
87.9
dB
Frequency response
50 - 5000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
76.0
Hz
Mechanical quality factor
QMS
10.70
Electrical quality factor
QES
0.82
Total quality factor
QTS
0.77
Large signal parameters
Power handling
P
120
W
Program power
Pmax
240
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.0
Ω
Inductance (1kHz, estimated)
LE
0.2
mH
VC Diameter
60
mm
Magnet
Force factor
Bl
5.0
N/A
Motor constant
Bl/√RE
2.89
N/√W
Diaphragm
Effective diameter
128
mm
Effective area
SD
128
cm²
Moving mass
MMS
14
g
Moving mass (without air load)
MMD
12.9
g
Material
Kevlar Sandwich
Suspensions
Stiffness
KMS
3.33
N/mm
Compliance
CMS
300
µm/N
Equivalent volume to the compliance
VAS
7
L
Mechanical resistance
RMS
0.62
N·s/m
Surround material
TMD
Dimensions
Nominal diameter
6.5
″
165
mm
Overall diameter
165
mm
Baffle cutout diameter
141
mm
Mounting depth
54
mm
Volume occupied by the driver (estimated)
0.8
L
Net weight
1.95
kg
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Similar woofers to Focal 6.5 KM
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6.5″Mid Bass
fS
74 Hz
SD
133 cm²
60 - 3500 Hz
QTS
0.74
xmax
3.7 mm
SPL1W
88 dB
Bl/√RE
2.61
Pmax
150 W
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6.5″Woofer
fS
80 Hz
SD
142 cm²
65 - 5000 Hz
QTS
0.80
xmax
3.2 mm
SPL1W
88 dB
Bl/√RE
2.37
Pmax
180 W
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