Goldwood GW-1858
Subwoofer
18″ / 457 mm
Nominal diameter
30 Hz
Resonance
1.1
Q factor
93 dB
Sensitivity
± 2 mm
Linear excursion
340 W
Program Power
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Parts Express
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
93.3
dB
Frequency response
20 - 6000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
30.3
Hz
Mechanical quality factor
QMS
6.70
Electrical quality factor
QES
1.30
Total quality factor
QTS
1.10
Large signal parameters
Maximum linear excursion
xmax
2.0
mm
Air volume displaced at xmax
VD
255
cm³
Power handling
P
220
W
Program power
Pmax
340
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.3
Ω
Inductance (1kHz)
LE
0.6
mH
VC Diameter
64
mm
Winding material
Aluminum
Magnet
Force factor
Bl
9.8
N/A
Motor constant
Bl/√RE
4.26
N/√W
Weight
1.417
kg
Diaphragm
Effective diameter
403
mm
Effective area
SD
1277
cm²
Moving mass
MMS
120.9
g
Moving mass (without air load)
MMD
90.2
g
Material
Polymer
Suspensions
Stiffness
KMS
4.37
N/mm
Compliance
CMS
229
µm/N
Equivalent volume to the compliance
VAS
524
L
Mechanical resistance
RMS
3.43
N·s/m
Dimensions
Nominal diameter
18
″
457
mm
Overall diameter
457
mm
Baffle cutout diameter
419
mm
Mounting depth
200
mm
Volume occupied by the driver (estimated)
1.5
L
Net weight
3.572
kg
Frame material
Stamped Steel
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fS
31 Hz
SD
823 cm²
20 - 2500 Hz
QTS
1.09
xmax
3.5 mm
SPL1W
93 dB
Bl/√RE
3.71
Pmax
300 W