B&C Speaker 8FW51

Mid Bass

8″ / 200 mm
Nominal diameter
74 Hz
Resonance
0.21
Q factor
95 dB
Sensitivity
± 6 mm
Linear excursion
400 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
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Specifications

Sensitivity (1W, 1m, infinite baffle)
SPL1W
95.2
dB
Frequency response
70 - 5000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
74.0
Hz
Mechanical quality factor
QMS
9.30
Electrical quality factor
QES
0.21
Total quality factor
QTS
0.21

Large signal parameters

Maximum linear excursion
xmax
6.0
mm
Air volume displaced at xmax
VD
132
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
0.56
mH
VC Diameter
51
mm
Winding height
HVC
17
mm
Winding material
Copper
Former material
Kapton

Magnet

Flux density
B
1.35
T
Force factor
Bl
17.7
N/A
Motor constant
Bl/√RE
7.76
N/√W
Air gap height
HAG
10
mm
Material
Ferrite

Diaphragm

Effective diameter
167
mm
Effective area
SD
220
cm²
Moving mass
MMS
27
g
Moving mass (without air load)
MMD
24.5
g
Material
Waterproof Both Sides

Suspensions

Stiffness
KMS
5.88
N/mm
Compliance
CMS
170
µm/N
Equivalent volume to the compliance
VAS
12
L
Mechanical resistance
RMS
1.35
N·s/m

Dimensions

Nominal diameter
8
200
mm
Overall diameter
225
mm
Baffle cutout diameter
187
mm
Overall depth
100
mm
Flange thickness
9
mm
Mounting depth
91
mm
Volume occupied by the driver
1.5
L
Net weight
5.6
kg
B&C Speaker 8FW51 Impedance
B&C Speaker 8FW51 SPL
B&C Speaker 8FW51 Dimensions

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