ETON 4-512/C8/25RP
Mid-range
4″ / 122 mm
Nominal diameter
78 Hz
Resonance
0.32
Q factor
89 dB
Sensitivity
± 2 mm
Linear excursion
80 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
88.9
dB
Frequency response
78 - 5000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
78.0
Hz
Mechanical quality factor
QMS
6.65
Electrical quality factor
QES
0.34
Total quality factor
QTS
0.32
Large signal parameters
Maximum linear excursion
xmax
2.0
mm
Air volume displaced at xmax
VD
11
cm³
Power handling
P
40
W
Program power
Pmax
80
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.8
Ω
Inductance (1kHz)
LE
0.35
mH
VC Diameter
25
mm
Winding material
Kapton
Magnet
Force factor
Bl
6.0
N/A
Motor constant
Bl/√RE
2.49
N/√W
Diameter
90
mm
Diaphragm
Effective diameter
84
mm
Effective area
SD
55
cm²
Moving mass
MMS
4.5
g
Moving mass (without air load)
MMD
4.2
g
Suspensions
Stiffness
KMS
1.16
N/mm
Compliance
CMS
860
µm/N
Equivalent volume to the compliance
VAS
3.7
L
Mechanical resistance
RMS
0.33
N·s/m
Dimensions
Nominal diameter
4
″
122
mm
Overall diameter
122
mm
Baffle cutout diameter
96
mm
Overall depth
66
mm
Flange thickness
6
mm
Mounting depth
60
mm
Volume occupied by the driver (estimated)
0.32
L
Net weight
1.23
kg
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SpeakerbenchSimilar woofers to ETON 4-512/C8/25RP
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4″Full-range
fS
70 Hz
SD
57 cm²
70 - 20000 Hz
QTS
0.34
xmax
2.5 mm
SPL1W
90 dB
Bl/√RE
2.12
Pmax
50 W