15″ / 380 mm
Nominal diameter
38 Hz
Resonance
0.39
Q factor
95 dB
Sensitivity
± 7.5 mm
Linear excursion
800 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
95.2
dB
Frequency response
40 - 4100
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
38.0
Hz
Mechanical quality factor
QMS
9.50
Electrical quality factor
QES
0.40
Total quality factor
QTS
0.39
Large signal parameters
Maximum linear excursion
xmax
7.5
mm
Air volume displaced at xmax
VD
638
cm³
Power handling
P
500
W
Program power
Pmax
800
W
Voice Coil
Nominal impedance
Z
16
Ω
DC resistance
RE
10.9
Ω
Inductance (1kHz)
LE
2.5
mH
VC Diameter
75
mm
Magnet
Force factor
Bl
24.2
N/A
Motor constant
Bl/√RE
7.33
N/√W
Diaphragm
Effective diameter
329
mm
Effective area
SD
850
cm²
Moving mass
MMS
92
g
Moving mass (without air load)
MMD
74.7
g
Suspensions
Stiffness
KMS
5.24
N/mm
Compliance
CMS
191
µm/N
Equivalent volume to the compliance
VAS
195
L
Mechanical resistance
RMS
2.31
N·s/m
Dimensions
Nominal diameter
15
″
380
mm
Overall diameter
387
mm
Baffle cutout diameter
353
mm
Overall depth
177
mm
Flange thickness
11
mm
Mounting depth
166
mm
Volume occupied by the driver (estimated)
2.7
L
Net weight
4.0
kg
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QSpeakers
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SpeakerbenchSimilar subwoofers to Eighteen Sound 15ND930 16Ω
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18″Low frequency
fS
40 Hz
SD
1225 cm²
35 - 1000 Hz
QTS
0.41
xmax
7.0 mm
SPL1W
95 dB
Bl/√RE
11
Pmax
2000 W
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18″Woofer
fS
34 Hz
SD
1110 cm²
35 - 1000 Hz
QTS
0.34
xmax
7.3 mm
SPL1W
96 dB
Bl/√RE
9.62
Pmax
1000 W
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15″Subwoofer
fS
36 Hz
SD
880 cm²
40 - 4000 Hz
QTS
0.34
xmax
6.3 mm
SPL1W
96 dB
Bl/√RE
7.69
Pmax
800 W