15″ / 381 mm
Nominal diameter
30 Hz
Resonance
1.86
Q factor
92 dB
Sensitivity
± 3.5 mm
Linear excursion
250 W
Program Power
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Parts Express
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
91.9
dB
Frequency response
22 - 3000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
29.6
Hz
Mechanical quality factor
QMS
7.89
Electrical quality factor
QES
2.44
Total quality factor
QTS
1.86
Large signal parameters
Maximum linear excursion
xmax
3.5
mm
Air volume displaced at xmax
VD
288
cm³
Power handling
P
135
W
Program power
Pmax
250
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.6
Ω
Inductance (1kHz)
LE
0.4
mH
VC Diameter
38
mm
Winding material
Aluminum
Magnet
Force factor
Bl
5.08
N/A
Motor constant
Bl/√RE
2.67
N/√W
Weight
0.567
kg
Diaphragm
Effective diameter
324
mm
Effective area
SD
823
cm²
Moving mass
MMS
94.4
g
Moving mass (without air load)
MMD
77.9
g
Material
Poly
Suspensions
Stiffness
KMS
3.27
N/mm
Compliance
CMS
306
µm/N
Equivalent volume to the compliance
VAS
292
L
Mechanical resistance
RMS
2.23
N·s/m
Surround material
Rolled Foam
Dimensions
Nominal diameter
15
″
381
mm
Overall diameter
381
mm
Baffle cutout diameter
356
mm
Mounting depth
130
mm
Volume occupied by the driver (estimated)
0.96
L
Net weight
2.325
kg
Frame material
Stamped Steel
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QSpeakers
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SpeakerbenchSimilar subwoofers to Goldwood GW-215/4
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15″Woofer
fS
30 Hz
SD
823 cm²
22 - 3000 Hz
QTS
1.95
xmax
3.5 mm
SPL1W
93 dB
Bl/√RE
2.28
Pmax
250 W