Eminence BETA-8CX
Coaxial
8″ / 203 mm
Nominal diameter
62 Hz
Resonance
0.29
Q factor
94 dB
Sensitivity
± 3.2 mm
Linear excursion
500 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
93.5
dB
Frequency response
95 - 3300
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
62.0
Hz
Mechanical quality factor
QMS
6.57
Electrical quality factor
QES
0.31
Total quality factor
QTS
0.29
Large signal parameters
Maximum linear excursion
xmax
3.2
mm
Maximum excursion before damage
xlim
6.9
mm
Air volume displaced at xmax
VD
67
cm³
Power handling
P
250
W
Program power
Pmax
500
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.4
Ω
Inductance (1kHz)
LE
0.67
mH
VC Diameter
51
mm
Winding material
Copper
Former material
Kapton
Magnet
Force factor
Bl
11.21
N/A
Motor constant
Bl/√RE
4.84
N/√W
Air gap height
HAG
7.9
mm
Weight
1.077
kg
Material
Ferrite
Diaphragm
Effective diameter
164
mm
Effective area
SD
210
cm²
Moving mass
MMS
19
g
Moving mass (without air load)
MMD
16.7
g
Material
Paper
Suspensions
Stiffness
KMS
2.86
N/mm
Compliance
CMS
350
µm/N
Equivalent volume to the compliance
VAS
21.4
L
Mechanical resistance
RMS
1.13
N·s/m
Surround material
Sealed cloth
Dimensions
Nominal diameter
8
″
203
mm
Overall diameter
209
mm
Baffle cutout diameter
181
mm
Overall depth
89
mm
Volume occupied by the driver
0.79
L
Net weight
3.08
kg
Frame material
Pressed steel
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fS
60 Hz
SD
351 cm²
60 - 4000 Hz
QTS
0.26
xmax
7.5 mm
SPL1W
94 dB
Bl/√RE
7.93
Pmax
1000 W
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8″Full-range
fS
62 Hz
SD
214 cm²
65 - 15000 Hz
QTS
0.30
xmax
2.5 mm
SPL1W
94 dB
Bl/√RE
4.35
Pmax
260 W
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8″Mid Bass
fS
60 Hz
SD
220 cm²
60 - 4000 Hz
QTS
0.29
xmax
6.0 mm
SPL1W
94 dB
Bl/√RE
5.15
Pmax
400 W