B&C Speaker 8CX21
Coaxial
8″ / 210 mm
Nominal diameter
74 Hz
Resonance
0.36
Q factor
93 dB
Sensitivity
± 5 mm
Linear excursion
400 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
93.4
dB
Frequency response
75 - 20000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
74.0
Hz
Mechanical quality factor
QMS
4.10
Electrical quality factor
QES
0.39
Total quality factor
QTS
0.36
Large signal parameters
Maximum linear excursion
xmax
5.0
mm
Air volume displaced at xmax
VD
110
cm³
Power handling
P
200
W
Program power
Pmax
400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.2
Ω
Inductance (1kHz)
LE
1.2
mH
VC Diameter
52
mm
Winding height
HVC
16
mm
Winding material
Copper
Former material
Kapton
Magnet
Flux density
B
1.1
T
Force factor
Bl
11.5
N/A
Motor constant
Bl/√RE
5.04
N/√W
Air gap height
HAG
8
mm
Material
Ferrite
Diaphragm
Effective diameter
167
mm
Effective area
SD
220
cm²
Moving mass
MMS
21
g
Moving mass (without air load)
MMD
18.5
g
Material
Waterproof Front Side
Suspensions
Stiffness
KMS
4.61
N/mm
Compliance
CMS
217
µm/N
Equivalent volume to the compliance
VAS
15
L
Mechanical resistance
RMS
2.38
N·s/m
Dimensions
Nominal diameter
8
″
210
mm
Overall diameter
225
mm
Baffle cutout diameter
187
mm
Overall depth
135
mm
Flange thickness
11
mm
Mounting depth
124
mm
Volume occupied by the driver (estimated)
1.6
L
Net weight
4.1
kg
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Export this driver to a simulation software:
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8″Coaxial
fS
69 Hz
SD
220 cm²
70 - 18000 Hz
QTS
0.34
xmax
6.5 mm
SPL1W
93 dB
Bl/√RE
5.2
Pmax
500 W
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8″Woofer
fS
70 Hz
SD
223 cm²
80 - 5000 Hz
QTS
0.41
xmax
5.5 mm
SPL1W
92 dB
Bl/√RE
5.34
Pmax
500 W