4″ / 102 mm
Nominal diameter
120 Hz
Resonance
0.63
Q factor
88 dB
Sensitivity
± 2.6 mm
Linear excursion
110 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
87.5
dB
Frequency response
105 - 10000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
120
Hz
Mechanical quality factor
QMS
6.41
Electrical quality factor
QES
0.70
Total quality factor
QTS
0.63
Large signal parameters
Maximum linear excursion
xmax
2.6
mm
Maximum excursion before damage
xlim
4.5
mm
Air volume displaced at xmax
VD
15
cm³
Power handling
P
55
W
Program power
Pmax
110
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.4
Ω
Inductance (1kHz)
LE
0.18
mH
VC Diameter
25
mm
Winding material
Copper
Former material
Polyimide
Magnet
Force factor
Bl
4.12
N/A
Motor constant
Bl/√RE
2.23
N/√W
Air gap height
HAG
3.7
mm
Weight
0.283
kg
Material
Ferrite
Diaphragm
Effective diameter
86
mm
Effective area
SD
58
cm²
Moving mass
MMS
5
g
Moving mass (without air load)
MMD
4.7
g
Material
Paper
Suspensions
Stiffness
KMS
2.63
N/mm
Compliance
CMS
380
µm/N
Equivalent volume to the compliance
VAS
1.76
L
Mechanical resistance
RMS
0.59
N·s/m
Surround material
Cloth
Dimensions
Nominal diameter
4
″
102
mm
Overall diameter
116
mm
Baffle cutout diameter
96
mm
Overall depth
59
mm
Volume occupied by the driver
0.33
L
Net weight
0.68
kg
Frame material
Pressed steel
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Export this driver to a simulation software:
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SpeakerbenchSimilar speaker drivers to Eminence ALPHA 4-4
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3″Full-range
fS
110 Hz
SD
32 cm²
110 - 22000 Hz
QTS
0.56
xmax
1.1 mm
SPL1W
88 dB
Bl/√RE
1.44
Pmax
40 W