SICA 18 S 4 PL
Subwoofer
18″ / 462 mm
Nominal diameter
36 Hz
Resonance
0.39
Q factor
95 dB
Sensitivity
± 8 mm
Linear excursion
2400 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.5
dB
Frequency response
35 - 700
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
36.2
Hz
Mechanical quality factor
QMS
6.56
Electrical quality factor
QES
0.42
Total quality factor
QTS
0.39
Large signal parameters
Maximum linear excursion
xmax
8.0
mm
Air volume displaced at xmax
VD
931
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
1.35
mH
VC Diameter
100
mm
Winding height
HVC
12
mm
Winding material
Copper
Former material
Glass Fiber
Magnet
Flux density
B
1.21
T
Force factor
Bl
23.54
N/A
Motor constant
Bl/√RE
10.3
N/√W
Weight
0.536
kg
Material
Neodymium
Diaphragm
Effective diameter
385
mm
Effective area
SD
1164
cm²
Moving mass
MMS
197
g
Moving mass (without air load)
MMD
168.8
g
Material
Paper
Suspensions
Stiffness
KMS
10.2
N/mm
Compliance
CMS
98
µm/N
Equivalent volume to the compliance
VAS
189
L
Mechanical resistance
RMS
6.83
N·s/m
Surround material
Treated Cloth
Dimensions
Nominal diameter
18
″
462
mm
Overall diameter
462
mm
Baffle cutout diameter
417
mm
Overall depth
211
mm
Volume occupied by the driver (estimated)
5.4
L
Net weight
8.3
kg
Frame material
Aluminium Die-Cast
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