8″ / 200 mm
Nominal diameter
67 Hz
Resonance
0.28
Q factor
94 dB
Sensitivity
± 5.5 mm
Linear excursion
500 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.3
dB
Frequency response
67 - 4500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
67.0
Hz
Mechanical quality factor
QMS
3.07
Electrical quality factor
QES
0.31
Total quality factor
QTS
0.28
Large signal parameters
Maximum linear excursion
xmax
5.5
mm
Air volume displaced at xmax
VD
125
cm³
Power handling
P
250
W
Program power
Pmax
500
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
4.7
Ω
Inductance (1kHz)
LE
0.48
mH
VC Diameter
51
mm
Winding height
HVC
15
mm
Winding material
Aluminium
Former material
Glass Fibre
Magnet
Flux density
B
1.19
T
Force factor
Bl
11.3
N/A
Motor constant
Bl/√RE
5.21
N/√W
Air gap height
HAG
8
mm
Material
Ferrite Ring
Diaphragm
Effective diameter
170
mm
Effective area
SD
227
cm²
Moving mass
MMS
20.2
g
Moving mass (without air load)
MMD
17.6
g
Material
Waterproof
Suspensions
Stiffness
KMS
3.55
N/mm
Compliance
CMS
282
µm/N
Equivalent volume to the compliance
VAS
20.7
L
Mechanical resistance
RMS
2.77
N·s/m
Dimensions
Nominal diameter
8
″
200
mm
Overall diameter
225
mm
Baffle cutout diameter
187
mm
Overall depth
92
mm
Flange thickness
9
mm
Mounting depth
83
mm
Volume occupied by the driver
1.2
L
Net weight
3.4
kg
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Export this driver to a simulation software:
WinISD
Basta!
Hornresp
QSpeakers
SpeakerSim
MfbLabs
SpeakerbenchSimilar woofers to B&C Speaker 8FMB51
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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
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10″Mid Bass
fS
68 Hz
SD
320 cm²
65 - 3500 Hz
QTS
0.29
xmax
7.0 mm
SPL1W
95 dB
Bl/√RE
7.81
Pmax
800 W
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10″Mid-range
fS
65 Hz
SD
317 cm²
80 - 2500 Hz
QTS
0.24
xmax
5.3 mm
SPL1W
95 dB
Bl/√RE
7.86
Pmax
800 W