Eighteen Sound 15NTLS3500

Subwoofer

15″ / 393 mm
Nominal diameter
28 Hz
Resonance
0.42
Q factor
90 dB
Sensitivity
± 15.3 mm
Linear excursion
1900 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
89.7
dB
Frequency response
30 - 2000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
28.0
Hz
Mechanical quality factor
QMS
8.20
Electrical quality factor
QES
0.44
Total quality factor
QTS
0.42

Large signal parameters

Maximum linear excursion
xmax
15.3
mm
Air volume displaced at xmax
VD
1348
cm³
Power handling
P
950
W
Program power
Pmax
1900
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.2
Ω
Inductance (1kHz)
LE
1.65
mH
VC Diameter
88
mm
Winding height
HVC
36
mm
Winding material
Copper

Magnet

Force factor
Bl
21.6
N/A
Motor constant
Bl/√RE
9.47
N/√W
Air gap height
HAG
11
mm
Material
Neodymium

Diaphragm

Effective diameter
335
mm
Effective area
SD
881
cm²
Moving mass
MMS
250
g
Moving mass (without air load)
MMD
231.8
g
Material
Weather protected

Suspensions

Stiffness
KMS
6.94
N/mm
Compliance
CMS
144
µm/N
Equivalent volume to the compliance
VAS
141
L
Mechanical resistance
RMS
5.36
N·s/m
Surround material
Rubber

Dimensions

Nominal diameter
15
393
mm
Overall diameter
393
mm
Baffle cutout diameter
357
mm
Overall depth
261
mm
Flange thickness
17
mm
Mounting depth
244
mm
Volume occupied by the driver (estimated)
5.6
L
Net weight
8.3
kg
Eighteen Sound 15NTLS3500 Impedance
Eighteen Sound 15NTLS3500 SPL
Eighteen Sound 15NTLS3500 Dimensions

Export this driver to a simulation software:

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fS
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SD
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QTS
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xmax
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SPL1W
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Bl/√RE
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