Hertz ECX 570.5
2 Way
5x7″/ 127x178 mm
Nominal size
77 Hz
Resonance
0.67
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
88.8
dB
Frequency response
60 - 23000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
76.5
Hz
Mechanical quality factor
QMS
3.20
Electrical quality factor
QES
0.84
Total quality factor
QTS
0.67
Large signal parameters
Maximum linear excursion
xmax
3.0
mm
Air volume displaced at xmax
VD
46
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
0.21
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
139
mm
Effective area
SD
152
cm²
Moving mass
MMS
13.5
g
Moving mass (without air load)
MMD
12.6
g
Material
Water-repellent pressed paper
Suspensions
Stiffness
KMS
3.13
N/mm
Compliance
CMS
320
µm/N
Equivalent volume to the compliance
VAS
10.5
L
Mechanical resistance
RMS
2.03
N·s/m
Dimensions
Nominal size
5 x 7
″
127 x 178
mm
Volume occupied by the driver (estimated)
0.25
L
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fS
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SD
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50 - 23000 Hz
QTS
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xmax
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SPL1W
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Pmax
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SD
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SD
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60 - 3500 Hz
QTS
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xmax
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SPL1W
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