Eminence ALPHA-15A
Bass Guitar Speaker
15″ / 381 mm
Nominal diameter
41 Hz
Resonance
1.26
Q factor
94 dB
Sensitivity
± 3.8 mm
Linear excursion
400 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.3
dB
Frequency response
46 - 3500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
41.0
Hz
Mechanical quality factor
QMS
7.23
Electrical quality factor
QES
1.53
Total quality factor
QTS
1.26
Large signal parameters
Maximum linear excursion
xmax
3.8
mm
Maximum excursion before damage
xlim
8.4
mm
Air volume displaced at xmax
VD
325
cm³
Power handling
P
200
W
Program power
Pmax
400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.9
Ω
Inductance (1kHz)
LE
0.84
mH
VC Diameter
38
mm
Winding material
Copper
Former material
Polyimide
Magnet
Force factor
Bl
7.7
N/A
Motor constant
Bl/√RE
3.18
N/√W
Air gap height
HAG
6.4
mm
Weight
0.709
kg
Material
Ferrite
Diaphragm
Effective diameter
330
mm
Effective area
SD
856
cm²
Moving mass
MMS
59
g
Moving mass (without air load)
MMD
41.7
g
Material
Paper
Suspensions
Stiffness
KMS
4.0
N/mm
Compliance
CMS
250
µm/N
Equivalent volume to the compliance
VAS
260
L
Mechanical resistance
RMS
2.1
N·s/m
Surround material
Cloth
Dimensions
Nominal diameter
15
″
381
mm
Overall diameter
385
mm
Baffle cutout diameter
352
mm
Overall depth
148
mm
Volume occupied by the driver
3.21
L
Net weight
3.04
kg
Frame material
Pressed steel
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