18″ / 462 mm
Nominal diameter
34 Hz
Resonance
0.31
Q factor
95 dB
Sensitivity
± 14 mm
Linear excursion
3600 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
95.2
dB
Frequency response
32 - 2500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
34.0
Hz
Mechanical quality factor
QMS
7.00
Electrical quality factor
QES
0.32
Total quality factor
QTS
0.31
Large signal parameters
Maximum linear excursion
xmax
14.0
mm
Air volume displaced at xmax
VD
1711
cm³
Power handling
P
1800
W
Program power
Pmax
3600
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.5
Ω
Inductance (1kHz)
LE
1.9
mH
VC Diameter
135
mm
Magnet
Force factor
Bl
28.0
N/A
Motor constant
Bl/√RE
11.9
N/√W
Diaphragm
Effective diameter
394
mm
Effective area
SD
1222
cm²
Moving mass
MMS
218
g
Moving mass (without air load)
MMD
188.3
g
Suspensions
Stiffness
KMS
9.9
N/mm
Compliance
CMS
101
µm/N
Equivalent volume to the compliance
VAS
206
L
Mechanical resistance
RMS
6.65
N·s/m
Dimensions
Nominal diameter
18
″
462
mm
Overall diameter
462
mm
Baffle cutout diameter
422
mm
Overall depth
237
mm
Flange thickness
26
mm
Mounting depth
211
mm
Volume occupied by the driver (estimated)
7.6
L
Net weight
12.5
kg
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SpeakerbenchSimilar subwoofers to Eighteen Sound 18NLW9000 8Ω
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18″Subwoofer
fS
34 Hz
SD
1225 cm²
30 - 2000 Hz
QTS
0.31
xmax
10.0 mm
SPL1W
95 dB
Bl/√RE
12
Pmax
2600 W
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18″Subwoofer
fS
35 Hz
SD
1212 cm²
35 - 1600 Hz
QTS
0.33
xmax
12.5 mm
SPL1W
95 dB
Bl/√RE
12
Pmax
2400 W
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18″Subwoofer
fS
35 Hz
SD
1212 cm²
35 - 1600 Hz
QTS
0.30
xmax
9.5 mm
SPL1W
96 dB
Bl/√RE
12
Pmax
2000 W