Eighteen Sound 18LW2500
Subwoofer
18″ / 462 mm
Nominal diameter
34 Hz
Resonance
0.33
Q factor
94 dB
Sensitivity
± 14 mm
Linear excursion
3200 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
93.6
dB
Frequency response
30 - 1000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
34.0
Hz
Mechanical quality factor
QMS
22.00
Electrical quality factor
QES
0.34
Total quality factor
QTS
0.33
Large signal parameters
Maximum linear excursion
xmax
14.0
mm
Maximum excursion before damage
xlim
35.0
mm
Air volume displaced at xmax
VD
1582
cm³
Power handling
P
1600
W
Program power
Pmax
3200
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
4.9
Ω
Inductance (1kHz)
LE
2.87
mH
VC Diameter
100
mm
Winding material
Copper
Magnet
Force factor
Bl
30.0
N/A
Motor constant
Bl/√RE
13.6
N/√W
Material
Ferrite
Diaphragm
Effective diameter
379
mm
Effective area
SD
1130
cm²
Moving mass
MMS
290
g
Moving mass (without air load)
MMD
262.7
g
Material
Curved ribbed fiber loaded cellulose
Suspensions
Stiffness
KMS
13.33
N/mm
Compliance
CMS
75
µm/N
Equivalent volume to the compliance
VAS
135
L
Mechanical resistance
RMS
2.82
N·s/m
Surround material
Triple roll, Heavy Polycotton
Dimensions
Nominal diameter
18
″
462
mm
Overall diameter
462
mm
Baffle cutout diameter
422
mm
Overall depth
234
mm
Flange thickness
26
mm
Mounting depth
208
mm
Volume occupied by the driver (estimated)
9.1
L
Net weight
16.7
kg
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SD
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SD
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QTS
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xmax
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