Hertz CPK 165 PRO
2 Way Kit
6.5″ / 165 mm
Nominal diameter
60 Hz
Resonance
0.57
Q factor
88 dB
Sensitivity
± 3.9 mm
Linear excursion
315 W
Program Power
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Specifications
Sensitivity (1W, 1m, infinite baffle)
SPL1W
87.7
dB
Frequency response
45 - 22500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
60.0
Hz
Mechanical quality factor
QMS
4.30
Electrical quality factor
QES
0.66
Total quality factor
QTS
0.57
Large signal parameters
Maximum linear excursion
xmax
3.9
mm
Air volume displaced at xmax
VD
53
cm³
Power handling
P
105
W
Program power
Pmax
315
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.3
Ω
Inductance (1kHz)
LE
0.3
mH
VC Diameter
25
mm
Magnet
Force factor
Bl
5.45
N/A
Motor constant
Bl/√RE
3.0
N/√W
Material
High density flux ferrite
Diaphragm
Effective diameter
132
mm
Effective area
SD
136
cm²
Moving mass
MMS
15.4
g
Moving mass (without air load)
MMD
14.2
g
Material
Pressed-paper cone
Suspensions
Stiffness
KMS
2.27
N/mm
Compliance
CMS
440
µm/N
Equivalent volume to the compliance
VAS
11.5
L
Mechanical resistance
RMS
1.35
N·s/m
Dimensions
Nominal diameter
6.5
″
165
mm
Volume occupied by the driver (estimated)
0.5
L
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SpeakerbenchSimilar woofers to Hertz CPK 165 PRO
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6.5″2 Way
fS
60 Hz
SD
133 cm²
45 - 22000 Hz
QTS
0.55
xmax
3.9 mm
SPL1W
88 dB
Bl/√RE
2.92
Pmax
285 W
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6.5″Mid Bass
fS
60 Hz
SD
131 cm²
50 - 3500 Hz
QTS
0.55
xmax
3.7 mm
SPL1W
87 dB
Bl/√RE
2.82
Pmax
225 W