Eighteen Sound 18NLW4500

Subwoofer

18″ / 462 mm
Nominal diameter
37 Hz
Resonance
0.31
Q factor
95 dB
Sensitivity
± 14.75 mm
Linear excursion
3600 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
Sensitivity (1W, 1m, infinite baffle)
SPL1W
94.7
dB
Frequency response
30 - 1000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
37.0
Hz
Mechanical quality factor
QMS
10.80
Electrical quality factor
QES
0.32
Total quality factor
QTS
0.31

Large signal parameters

Maximum linear excursion
xmax
14.75
mm
Air volume displaced at xmax
VD
1807
cm³
Power handling
P
1800
W
Program power
Pmax
3600
W

Voice Coil

Nominal impedance
Z
4
Ω
DC resistance
RE
3.3
Ω
Inductance (1kHz)
LE
1.59
mH
VC Diameter
115
mm
Winding height
HVC
36
mm
Winding material
Copper

Magnet

Force factor
Bl
26.7
N/A
Motor constant
Bl/√RE
14.7
N/√W
Air gap height
HAG
13
mm
Material
Neodymium

Diaphragm

Effective diameter
395
mm
Effective area
SD
1225
cm²
Moving mass
MMS
296
g
Moving mass (without air load)
MMD
266.3
g
Material
Weather protected

Suspensions

Stiffness
KMS
15.87
N/mm
Compliance
CMS
63
µm/N
Equivalent volume to the compliance
VAS
127
L
Mechanical resistance
RMS
6.37
N·s/m

Dimensions

Nominal diameter
18
462
mm
Overall diameter
462
mm
Baffle cutout diameter
422
mm
Overall depth
233
mm
Flange thickness
23
mm
Mounting depth
210
mm
Volume occupied by the driver (estimated)
7.3
L
Net weight
12.0
kg
Eighteen Sound 18NLW4500 Impedance
Eighteen Sound 18NLW4500 SPL
Eighteen Sound 18NLW4500 Dimensions

Export this driver to a simulation software:

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