Goldwood GW-204/8S

Woofer

4″ / 127 mm
Nominal diameter
137 Hz
Resonance
1.56
Q factor
88 dB
Sensitivity
± 1.5 mm
Linear excursion
70 W
Program Power
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply

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Specifications

Sensitivity (1W, 1m, infinite baffle)
SPL1W
87.5
dB
Frequency response
70 - 1300
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
137
Hz
Mechanical quality factor
QMS
6.82
Electrical quality factor
QES
2.02
Total quality factor
QTS
1.56

Large signal parameters

Maximum linear excursion
xmax
1.5
mm
Air volume displaced at xmax
VD
8.0
cm³
Power handling
P
40
W
Program power
Pmax
70
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
7.3
Ω
Inductance (1kHz)
LE
0.2
mH
VC Diameter
25
mm
Winding material
Aluminum

Magnet

Force factor
Bl
3.9
N/A
Motor constant
Bl/√RE
1.44
N/√W
Weight
0.283
kg

Diaphragm

Effective diameter
83
mm
Effective area
SD
54
cm²
Moving mass
MMS
4.9
g
Moving mass (without air load)
MMD
4.6
g
Material
Poly

Suspensions

Stiffness
KMS
3.63
N/mm
Compliance
CMS
276
µm/N
Equivalent volume to the compliance
VAS
1.1
L
Mechanical resistance
RMS
0.62
N·s/m
Surround material
Rolled Foam

Dimensions

Nominal diameter
4
127
mm
Overall diameter
127
mm
Baffle cutout diameter
102
mm
Mounting depth
54
mm
Volume occupied by the driver (estimated)
0.38
L
Net weight
0.964
kg
Frame material
Stamped Steel
Goldwood GW-204/8S SPL & Impedance

Export this driver to a simulation software:

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fS
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SD
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xmax
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Bl/√RE
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