8″ / 203 mm
Nominal diameter
34 Hz
Resonance
0.33
Q factor
90 dB
Sensitivity
± 5.75 mm
Linear excursion
100 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
89.7
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
33.7
Hz
Mechanical quality factor
QMS
2.78
Electrical quality factor
QES
0.37
Total quality factor
QTS
0.33
Large signal parameters
Maximum linear excursion
xmax
5.75
mm
Air volume displaced at xmax
VD
124
cm³
Power handling
P
50
W
Program power
Pmax
100
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.4
Ω
Inductance (1kHz)
LE
0.71
mH
VC Diameter
31
mm
Winding height
HVC
16.5
mm
Magnet
Flux density
B
1.2
T
Force factor
Bl
6.6
N/A
Motor constant
Bl/√RE
3.58
N/√W
Air gap height
HAG
5
mm
Weight
0.54
kg
Diaphragm
Effective diameter
166
mm
Effective area
SD
216
cm²
Moving mass
MMS
22.4
g
Moving mass (without air load)
MMD
20.1
g
Suspensions
Stiffness
KMS
1.0
N/mm
Compliance
CMS
1000
µm/N
Equivalent volume to the compliance
VAS
66.2
L
Mechanical resistance
RMS
1.7
N·s/m
Dimensions
Nominal diameter
8
″
203
mm
Volume occupied by the driver (estimated)
0.58
L
Net weight
1.43
kg
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Export this driver to a simulation software:
WinISD
Basta!
Hornresp
QSpeakers
SpeakerSim
MfbLabs
SpeakerbenchSimilar woofers to SB Acoustics SB20PFC30-4
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10″Woofer
fS
33 Hz
SD
314 cm²
33 - 3000 Hz
QTS
0.33
xmax
8.5 mm
SPL1W
90 dB
Bl/√RE
5.49
Pmax
300 W
.jpg.webp)
VISATON GF 200 - 2 x 4 Ohm2 x 4 Ω
8″Woofer
fS
30 Hz
SD
214 cm²
30 - 8000 Hz
QTS
0.34
xmax
6.0 mm
SPL1W
89 dB
Bl/√RE
3.82
Pmax
180 W
.jpg.webp)
8″Woofer
fS
34 Hz
SD
227 cm²
40 - 2000 Hz
QTS
0.38
xmax
7.5 mm
SPL1W
89 dB
Bl/√RE
3.88
Pmax
60 W