Goldwood GW-408D
Woofer
8″ / 203 mm
Nominal diameter
51 Hz
Resonance
0.64
Q factor
88 dB
Sensitivity
± 2.5 mm
Linear excursion
220 W
Program Power
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Parts Express
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
87.5
dB
Frequency response
44 - 5000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
51.2
Hz
Mechanical quality factor
QMS
4.46
Electrical quality factor
QES
0.75
Total quality factor
QTS
0.64
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
220
W
Voice Coil
Nominal impedance
Z
2 x 8
Ω
DC resistance (in series)
RE
14.8
Ω
Inductance (1kHz, in series)
LE
2.0
mH
VC Diameter
25
mm
Winding material
Aluminum
Magnet
Force factor (in series)
Bl
13.25
N/A
Motor constant
Bl/√RE
3.45
N/√W
Weight
0.567
kg
Diaphragm
Effective diameter
162
mm
Effective area
SD
206
cm²
Moving mass
MMS
27.7
g
Moving mass (without air load)
MMD
25.5
g
Material
Poly
Suspensions
Stiffness
KMS
2.86
N/mm
Compliance
CMS
350
µm/N
Equivalent volume to the compliance
VAS
20.8
L
Mechanical resistance
RMS
2.0
N·s/m
Surround material
Rolled Foam
Dimensions
Nominal diameter
8
″
203
mm
Overall diameter
203
mm
Baffle cutout diameter
181
mm
Mounting depth
92
mm
Volume occupied by the driver (estimated)
0.67
L
Net weight
1.644
kg
Frame material
Stamped Steel
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SpeakerbenchSimilar woofers to Goldwood GW-408D
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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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8″Woofer
fS
52 Hz
SD
206 cm²
45 - 7000 Hz
QTS
0.70
xmax
2.5 mm
SPL1W
87 dB
Bl/√RE
3.08
Pmax
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6.5″Mid-range
fS
49 Hz
SD
140 cm²
49 - 5000 Hz
QTS
0.55
xmax
3.0 mm
SPL1W
88 dB
Bl/√RE
2.16
Pmax
150 W