Goldwood GW-4028/S
Woofer
4″ / 111 mm
Nominal diameter
83 Hz
Resonance
0.7
Q factor
83 dB
Sensitivity
± 1.8 mm
Linear excursion
70 W
Program Power
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Parts Express
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
82.9
dB
Frequency response
70 - 10000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
83.1
Hz
Mechanical quality factor
QMS
2.40
Electrical quality factor
QES
1.00
Total quality factor
QTS
0.70
Large signal parameters
Maximum linear excursion
xmax
1.8
mm
Air volume displaced at xmax
VD
8.9
cm³
Power handling
P
40
W
Program power
Pmax
70
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
7.1
Ω
Inductance (1kHz)
LE
0.4
mH
VC Diameter
25
mm
Winding material
Aluminum
Magnet
Force factor
Bl
4.8
N/A
Motor constant
Bl/√RE
1.8
N/√W
Weight
0.454
kg
Diaphragm
Effective diameter
79
mm
Effective area
SD
50
cm²
Moving mass
MMS
6
g
Moving mass (without air load)
MMD
5.7
g
Material
Poly-Mica
Suspensions
Stiffness
KMS
1.65
N/mm
Compliance
CMS
606
µm/N
Equivalent volume to the compliance
VAS
2.1
L
Mechanical resistance
RMS
1.31
N·s/m
Surround material
Rubber
Dimensions
Nominal diameter
4
″
111
mm
Overall diameter
111
mm
Baffle cutout diameter
102
mm
Mounting depth
70
mm
Volume occupied by the driver (estimated)
0.5
L
Net weight
1.247
kg
Frame material
Stamped Steel
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SpeakerbenchSimilar woofers to Goldwood GW-4028/S
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4″Full-range
fS
90 Hz
SD
50 cm²
80 - 20000 Hz
QTS
0.67
xmax
1.5 mm
SPL1W
83 dB
Bl/√RE
1.71
Pmax
50 W
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3″Full-range
fS
82 Hz
SD
30 cm²
80 - 20000 Hz
QTS
0.63
xmax
2.0 mm
SPL1W
83 dB
Bl/√RE
1.34
Pmax
60 W