SICA 18 PFS 4
Subwoofer
18″ / 463 mm
Nominal diameter
29 Hz
Resonance
0.33
Q factor
94 dB
Sensitivity
± 9 mm
Linear excursion
2400 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
93.6
dB
Frequency response
30 - 2000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
29.0
Hz
Mechanical quality factor
QMS
5.30
Electrical quality factor
QES
0.35
Total quality factor
QTS
0.33
Large signal parameters
Maximum linear excursion
xmax
9.0
mm
Air volume displaced at xmax
VD
1048
cm³
Power handling
P
1200
W
Program power
Pmax
2400
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.1
Ω
Inductance (1kHz)
LE
1.38
mH
VC Diameter
100
mm
Winding height
HVC
12
mm
Winding material
Copper
Former material
Glass Fiber
Magnet
Flux density
B
1.05
T
Force factor
Bl
19.72
N/A
Motor constant
Bl/√RE
11.2
N/√W
Weight
3.3
kg
Material
Ferrite
Diaphragm
Effective diameter
385
mm
Effective area
SD
1164
cm²
Moving mass
MMS
238.2
g
Moving mass (without air load)
MMD
210
g
Material
Paper
Suspensions
Stiffness
KMS
7.94
N/mm
Compliance
CMS
126
µm/N
Equivalent volume to the compliance
VAS
242
L
Mechanical resistance
RMS
8.19
N·s/m
Surround material
Treated Cloth
Dimensions
Nominal diameter
18
″
463
mm
Overall diameter
462
mm
Baffle cutout diameter
417
mm
Overall depth
210
mm
Volume occupied by the driver (estimated)
7.2
L
Net weight
13.0
kg
Frame material
Aluminium Die-Cast
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SD
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