18″ / 460 mm
Nominal diameter
35 Hz
Resonance
0.31
Q factor
96 dB
Sensitivity
± 9.5 mm
Linear excursion
2400 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
Sensitivity (1w, 1m, infinite baffle)
SPL1W
95.9
dB
Frequency response
30 - 2500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
35.0
Hz
Mechanical quality factor
QMS
7.20
Electrical quality factor
QES
0.32
Total quality factor
QTS
0.31
Large signal parameters
Maximum linear excursion
xmax
9.5
mm
Maximum excursion before damage
xlim
25.0
mm
Air volume displaced at xmax
VD
1159
cm³
Power handling
P
1200
W
Program power
Pmax
2400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.0
Ω
Inductance (1kHz)
LE
1.35
mH
VC Diameter
100
mm
Magnet
Force factor
Bl
25.6
N/A
Motor constant
Bl/√RE
11.4
N/√W
Diaphragm
Effective diameter
394
mm
Effective area
SD
1220
cm²
Moving mass
MMS
192
g
Moving mass (without air load)
MMD
162.4
g
Suspensions
Stiffness
KMS
9.17
N/mm
Compliance
CMS
109
µm/N
Equivalent volume to the compliance
VAS
230
L
Mechanical resistance
RMS
5.86
N·s/m
Surround material
Polycotton
Dimensions
Nominal diameter
18
″
460
mm
Overall diameter
462
mm
Baffle cutout diameter
422
mm
Overall depth
214
mm
Flange thickness
25
mm
Mounting depth
189
mm
Volume occupied by the driver (estimated)
6.9
L
Net weight
11.9
kg
Similar subwoofers to Eighteen Sound 18LW2400WP
18″Subwoofer
fS
35 Hz
SD
1225 cm²
31 - 2500 Hz
QTS
0.31
xmax
9.5 mm
SPL1W
96 dB
Bl/√RE
11
Pmax
2400 W
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
18″Subwoofer
fS
37 Hz
SD
1164 cm²
35 - 700 Hz
QTS
0.32
xmax
6.5 mm
SPL1W
96 dB
Bl/√RE
11
Pmax
2400 W