Eighteen Sound 18W2000
Low frequency
18″ / 460 mm
Nominal diameter
37 Hz
Resonance
0.25
Q factor
98 dB
Sensitivity
± 7 mm
Linear excursion
2400 W
Program Power
Discontinued
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
97.5
dB
Frequency response
37 - 3000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
37.0
Hz
Mechanical quality factor
QMS
7.29
Electrical quality factor
QES
0.26
Total quality factor
QTS
0.25
Large signal parameters
Maximum linear excursion
xmax
7.0
mm
Maximum excursion before damage
xlim
18.0
mm
Air volume displaced at xmax
VD
794
cm³
Power handling
P
1200
W
Program power
Pmax
2400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.8
Ω
Inductance (1kHz)
LE
1.9
mH
VC Diameter
100
mm
Winding material
Copper
Magnet
Force factor
Bl
27.1
N/A
Motor constant
Bl/√RE
11.3
N/√W
Material
Ferrite
Diaphragm
Effective diameter
380
mm
Effective area
SD
1134
cm²
Moving mass
MMS
143
g
Moving mass (without air load)
MMD
115.6
g
Material
Curvilinear, Paper
Suspensions
Stiffness
KMS
7.94
N/mm
Compliance
CMS
126
µm/N
Equivalent volume to the compliance
VAS
230
L
Mechanical resistance
RMS
4.56
N·s/m
Surround material
M-roll, Polycotton
Dimensions
Nominal diameter
18
″
460
mm
Overall diameter
462
mm
Baffle cutout diameter
412
mm
Overall depth
206
mm
Flange thickness
19
mm
Mounting depth
187
mm
Volume occupied by the driver (estimated)
6.6
L
Net weight
11.5
kg
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SD
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SD
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QTS
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