SICA 18 S 4 CP
Subwoofer
18″ / 463 mm
Nominal diameter
33 Hz
Resonance
0.35
Q factor
94 dB
Sensitivity
± 11 mm
Linear excursion
2400 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.3
dB
Frequency response
30 - 700
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
33.0
Hz
Mechanical quality factor
QMS
3.94
Electrical quality factor
QES
0.39
Total quality factor
QTS
0.35
Large signal parameters
Maximum linear excursion
xmax
11.0
mm
Air volume displaced at xmax
VD
1281
cm³
Power handling
P
1200
W
Program power
Pmax
2400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.2
Ω
Inductance (1kHz)
LE
1.81
mH
VC Diameter
100
mm
Winding height
HVC
12
mm
Winding material
Copper
Former material
Glass Fiber
Magnet
Flux density
B
1.15
T
Force factor
Bl
23.5
N/A
Motor constant
Bl/√RE
10.3
N/√W
Weight
3.3
kg
Material
Ferrite
Diaphragm
Effective diameter
385
mm
Effective area
SD
1164
cm²
Moving mass
MMS
198.6
g
Moving mass (without air load)
MMD
170.4
g
Material
Paper
Suspensions
Stiffness
KMS
8.55
N/mm
Compliance
CMS
117
µm/N
Equivalent volume to the compliance
VAS
225
L
Mechanical resistance
RMS
10.45
N·s/m
Surround material
Treated Cloth
Dimensions
Nominal diameter
18
″
463
mm
Overall diameter
462
mm
Baffle cutout diameter
417
mm
Overall depth
204
mm
Volume occupied by the driver (estimated)
7.5
L
Net weight
14.2
kg
Frame material
Aluminium Die-Cast
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fS
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SD
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30 - 1000 Hz
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xmax
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SPL1W
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fS
32 Hz
SD
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fS
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SD
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35 - 1000 Hz
QTS
0.38
xmax
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SPL1W
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Bl/√RE
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