Eminence ALPHA 5-8
Mid Bass
5″ / 127 mm
Nominal diameter
87 Hz
Resonance
0.54
Q factor
90 dB
Sensitivity
± 5.92 mm
Linear excursion
250 W
Program Power
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Parts Express
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
90.2
dB
Frequency response
87 - 3500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
87.0
Hz
Mechanical quality factor
QMS
11.81
Electrical quality factor
QES
0.56
Total quality factor
QTS
0.54
Large signal parameters
Maximum linear excursion
xmax
5.92
mm
Maximum excursion before damage
xlim
6.4
mm
Air volume displaced at xmax
VD
61
cm³
Power handling
P
125
W
Program power
Pmax
250
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.0
Ω
Inductance (1kHz)
LE
0.29
mH
VC Diameter
38
mm
Winding material
Aluminum
Former material
Polyimide
Magnet
Force factor
Bl
6.22
N/A
Motor constant
Bl/√RE
2.78
N/√W
Air gap height
HAG
5.8
mm
Weight
0.567
kg
Material
Ferrite
Diaphragm
Effective diameter
114
mm
Effective area
SD
103
cm²
Moving mass
MMS
8
g
Moving mass (without air load)
MMD
7.2
g
Material
Water resistant pulp
Suspensions
Stiffness
KMS
2.38
N/mm
Compliance
CMS
420
µm/N
Equivalent volume to the compliance
VAS
6.14
L
Mechanical resistance
RMS
0.37
N·s/m
Surround material
Cloth
Dimensions
Nominal diameter
5
″
127
mm
Overall diameter
149
mm
Baffle cutout diameter
122
mm
Overall depth
74
mm
Volume occupied by the driver
0.51
L
Net weight
1.41
kg
Frame material
Pressed steel
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