B&C Speaker 8PS21
Woofer
8″ / 200 mm
Nominal diameter
73 Hz
Resonance
0.33
Q factor
93 dB
Sensitivity
± 5 mm
Linear excursion
400 W
Program Power
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Available on (affiliate link)
Parts Express
$$$
Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
93.4
dB
Frequency response
70 - 3000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
73.0
Hz
Mechanical quality factor
QMS
4.20
Electrical quality factor
QES
0.36
Total quality factor
QTS
0.33
Large signal parameters
Maximum linear excursion
xmax
5.0
mm
Air volume displaced at xmax
VD
110
cm³
Power handling
P
200
W
Program power
Pmax
400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.4
Ω
Inductance (1kHz)
LE
0.5
mH
VC Diameter
51
mm
Winding height
HVC
16
mm
Winding material
Copper
Former material
Kapton
Magnet
Flux density
B
1.1
T
Force factor
Bl
12.6
N/A
Motor constant
Bl/√RE
5.42
N/√W
Air gap height
HAG
8
mm
Material
Ferrite
Diaphragm
Effective diameter
167
mm
Effective area
SD
220
cm²
Moving mass
MMS
23
g
Moving mass (without air load)
MMD
20.5
g
Suspensions
Stiffness
KMS
4.85
N/mm
Compliance
CMS
206
µm/N
Equivalent volume to the compliance
VAS
14
L
Mechanical resistance
RMS
2.51
N·s/m
Dimensions
Nominal diameter
8
″
200
mm
Overall diameter
225
mm
Baffle cutout diameter
187
mm
Overall depth
91
mm
Flange thickness
11
mm
Mounting depth
80
mm
Volume occupied by the driver
1.2
L
Net weight
3.3
kg
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SD
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QTS
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SPL1W
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Bl/√RE
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fS
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SD
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SD
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70 - 4000 Hz
QTS
0.27
xmax
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SPL1W
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Bl/√RE
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