Hertz ECX 165.5
2 Way
6.5″ / 165 mm
Nominal diameter
72 Hz
Resonance
0.58
Q factor
89 dB
Sensitivity
± 3 mm
Linear excursion
210 W
Program Power
Discontinued
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Specifications
Sensitivity (1W, 1m, infinite baffle)
SPL1W
89.2
dB
Frequency response
60 - 23000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
72.0
Hz
Mechanical quality factor
QMS
3.10
Electrical quality factor
QES
0.72
Total quality factor
QTS
0.58
Large signal parameters
Maximum linear excursion
xmax
3.0
mm
Air volume displaced at xmax
VD
44
cm³
Power handling
P
70
W
Program power
Pmax
210
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.1
Ω
Inductance (1kHz, estimated)
LE
0.2
mH
VC Diameter
25
mm
Magnet
Force factor
Bl
4.9
N/A
Motor constant
Bl/√RE
2.78
N/√W
Material
High density flux ferrite
Diaphragm
Effective diameter
134
mm
Effective area
SD
145
cm²
Moving mass
MMS
12.7
g
Moving mass (without air load)
MMD
11.4
g
Material
Water-repellent pressed paper
Suspensions
Stiffness
KMS
2.5
N/mm
Compliance
CMS
400
µm/N
Equivalent volume to the compliance
VAS
12
L
Mechanical resistance
RMS
1.85
N·s/m
Dimensions
Nominal diameter
6.5
″
165
mm
Volume occupied by the driver (estimated)
0.5
L
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6″2 Way
fS
70 Hz
SD
118 cm²
50 - 21000 Hz
QTS
0.62
xmax
2.7 mm
SPL1W
89 dB
Bl/√RE
2.52
Pmax
120 W
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6″2 Way Kit
fS
70 Hz
SD
120 cm²
50 - 23000 Hz
QTS
0.62
xmax
2.7 mm
SPL1W
89 dB
Bl/√RE
2.52
Pmax
160 W
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6.5″2 way kit
fS
67 Hz
SD
129 cm²
60 - 22000 Hz
QTS
0.55
xmax
4.8 mm
SPL1W
89 dB
Bl/√RE
3.13
Pmax
200 W