B&C Speaker 8FMB51

16Ω

Mid Bass

8″ / 200 mm
Nominal diameter
68 Hz
Resonance
0.39
Q factor
93 dB
Sensitivity
± 5.5 mm
Linear excursion
500 W
Program Power
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply
Sensitivity (1W, 1m, infinite baffle)
SPL1W
93.1
dB
Frequency response
68 - 4500
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
68.0
Hz
Mechanical quality factor
QMS
4.10
Electrical quality factor
QES
0.43
Total quality factor
QTS
0.39

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
16
Ω
DC resistance
RE
9.8
Ω
Inductance (1kHz)
LE
0.83
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
13.73
N/A
Motor constant
Bl/√RE
4.39
N/√W
Air gap height
HAG
8
mm
Material
Ferrite Ring

Diaphragm

Effective diameter
170
mm
Effective area
SD
227
cm²
Moving mass
MMS
19.7
g
Moving mass (without air load)
MMD
17.1
g
Material
Waterproof

Suspensions

Stiffness
KMS
3.53
N/mm
Compliance
CMS
283
µm/N
Equivalent volume to the compliance
VAS
20.5
L
Mechanical resistance
RMS
2.05
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
1.1
L
Net weight
3.4
kg
B&C Speaker 8FMB51 Impedance
B&C Speaker 8FMB51 SPL
B&C Speaker 8FMB51 Dimensions

Export this driver to a simulation software:

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