8″ / 203 mm
Nominal diameter
52 Hz
Resonance
0.7
Q factor
87 dB
Sensitivity
± 2.5 mm
Linear excursion
200 W
Program Power
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Parts Express
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Specifications
Sensitivity (1W, 1m, infinite baffle)
SPL1W
87.4
dB
Frequency response
45 - 7000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
51.5
Hz
Mechanical quality factor
QMS
4.11
Electrical quality factor
QES
0.85
Total quality factor
QTS
0.70
Large signal parameters
Maximum linear excursion
xmax
2.5
mm
Air volume displaced at xmax
VD
52
cm³
Power handling
P
100
W
Program power
Pmax
200
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.7
Ω
Inductance (1kHz)
LE
0.4
mH
VC Diameter
38
mm
Winding material
Aluminum
Magnet
Force factor
Bl
5.93
N/A
Motor constant
Bl/√RE
3.08
N/√W
Weight
0.567
kg
Diaphragm
Effective diameter
162
mm
Effective area
SD
206
cm²
Moving mass
MMS
24.9
g
Moving mass (without air load)
MMD
22.7
g
Material
Poly
Suspensions
Stiffness
KMS
2.61
N/mm
Compliance
CMS
383
µm/N
Equivalent volume to the compliance
VAS
22.8
L
Mechanical resistance
RMS
1.96
N·s/m
Surround material
Rolled Foam
Dimensions
Nominal diameter
8
″
203
mm
Overall diameter
203
mm
Baffle cutout diameter
184
mm
Mounting depth
86
mm
Volume occupied by the driver (estimated)
0.62
L
Net weight
1.531
kg
Frame material
Stamped Steel
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QSpeakers
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SpeakerbenchSimilar woofers to Goldwood GW-208/4
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8″Woofer
fS
52 Hz
SD
201 cm²
35 - 2500 Hz
QTS
0.69
xmax
3.9 mm
SPL1W
87 dB
Bl/√RE
3.23
Pmax
225 W
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Goldwood GW-408D2 x 8 Ω
8″Woofer
fS
51 Hz
SD
206 cm²
44 - 5000 Hz
QTS
0.64
xmax
2.5 mm
SPL1W
88 dB
Bl/√RE
3.45
Pmax
220 W
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