B&C Speaker 8BG51

Subwoofer

8″ / 200 mm
Nominal diameter
52 Hz
Resonance
0.4
Q factor
90 dB
Sensitivity
± 6.5 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
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Specifications

Sensitivity (1W, 1m, infinite baffle)
SPL1W
89.6
dB
Frequency response
50 - 4000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
52.0
Hz
Mechanical quality factor
QMS
12.30
Electrical quality factor
QES
0.42
Total quality factor
QTS
0.40

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
5.1
Ω
Inductance (1kHz)
LE
0.5
mH
VC Diameter
51
mm
Winding height
HVC
17
mm
Winding material
Copper
Former material
Glass Fibre

Magnet

Flux density
B
1.15
T
Force factor
Bl
11.8
N/A
Motor constant
Bl/√RE
5.23
N/√W
Air gap height
HAG
8
mm
Material
Neodymium Inside Slug

Diaphragm

Effective diameter
167
mm
Effective area
SD
220
cm²
Moving mass
MMS
35
g
Moving mass (without air load)
MMD
32.5
g
Material
Waterproof Front Side

Suspensions

Stiffness
KMS
3.75
N/mm
Compliance
CMS
267
µm/N
Equivalent volume to the compliance
VAS
18
L
Mechanical resistance
RMS
0.93
N·s/m

Dimensions

Nominal diameter
8
200
mm
Overall diameter
225
mm
Baffle cutout diameter
187
mm
Overall depth
90
mm
Flange thickness
11
mm
Mounting depth
79
mm
Volume occupied by the driver
1.1
L
Net weight
1.85
kg
B&C Speaker 8BG51 Impedance
B&C Speaker 8BG51 SPL
B&C Speaker 8BG51 Dimensions

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