B&C Speaker 8FCX51
Coaxial
8″ / 210 mm
Nominal diameter
69 Hz
Resonance
0.34
Q factor
93 dB
Sensitivity
± 6.5 mm
Linear excursion
500 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
93.3
dB
Frequency response
70 - 18000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
69.0
Hz
Mechanical quality factor
QMS
6.30
Electrical quality factor
QES
0.36
Total quality factor
QTS
0.34
Large signal parameters
Maximum linear excursion
xmax
6.5
mm
Air volume displaced at xmax
VD
143
cm³
Power handling
P
250
W
Program power
Pmax
500
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
4.9
Ω
Inductance (1kHz)
LE
0.9
mH
VC Diameter
51
mm
Winding height
HVC
17.5
mm
Winding material
Aluminium
Former material
Glass Fibre
Magnet
Flux density
B
1.0
T
Force factor
Bl
11.5
N/A
Motor constant
Bl/√RE
5.2
N/√W
Air gap height
HAG
8
mm
Material
Ferrite
Diaphragm
Effective diameter
167
mm
Effective area
SD
220
cm²
Moving mass
MMS
22
g
Moving mass (without air load)
MMD
19.5
g
Material
Waterproof Front Side
Suspensions
Stiffness
KMS
4.22
N/mm
Compliance
CMS
237
µm/N
Equivalent volume to the compliance
VAS
16
L
Mechanical resistance
RMS
1.51
N·s/m
Dimensions
Nominal diameter
8
″
210
mm
Overall diameter
225
mm
Baffle cutout diameter
187
mm
Overall depth
118
mm
Flange thickness
10
mm
Mounting depth
108
mm
Volume occupied by the driver (estimated)
1.7
L
Net weight
5.0
kg
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Export this driver to a simulation software:
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8″Coaxial
fS
74 Hz
SD
220 cm²
75 - 20000 Hz
QTS
0.36
xmax
5.0 mm
SPL1W
93 dB
Bl/√RE
5.04
Pmax
400 W
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8″Coaxial
fS
65 Hz
SD
227 cm²
90 - 4700 Hz
QTS
0.35
xmax
6.0 mm
SPL1W
93 dB
Bl/√RE
5.42
Pmax
400 W