Eighteen Sound 15NLW4500

Subwoofer

15″ / 393 mm
Nominal diameter
35 Hz
Resonance
0.2
Q factor
95 dB
Sensitivity
± 14.5 mm
Linear excursion
3000 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
94.8
dB
Frequency response
40 - 1000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
35.0
Hz
Mechanical quality factor
QMS
6.38
Electrical quality factor
QES
0.21
Total quality factor
QTS
0.20

Large signal parameters

Maximum linear excursion
xmax
14.5
mm
Air volume displaced at xmax
VD
1278
cm³
Power handling
P
1500
W
Program power
Pmax
3000
W

Voice Coil

Nominal impedance
Z
4
Ω
DC resistance
RE
3.0
Ω
Inductance (1kHz)
LE
1.1
mH
VC Diameter
115
mm

Magnet

Force factor
Bl
24.4
N/A
Motor constant
Bl/√RE
14.1
N/√W

Diaphragm

Effective diameter
335
mm
Effective area
SD
881
cm²
Moving mass
MMS
198
g
Moving mass (without air load)
MMD
179.8
g

Suspensions

Stiffness
KMS
9.62
N/mm
Compliance
CMS
104
µm/N
Equivalent volume to the compliance
VAS
126
L
Mechanical resistance
RMS
6.82
N·s/m

Dimensions

Nominal diameter
15
393
mm
Overall diameter
393
mm
Baffle cutout diameter
356
mm
Overall depth
199
mm
Flange thickness
15
mm
Mounting depth
184
mm
Volume occupied by the driver (estimated)
5.8
L
Net weight
11.4
kg
Eighteen Sound 15NLW4500 Impedance
Eighteen Sound 15NLW4500 SPL
Eighteen Sound 15NLW4500 Dimensions

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