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
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply
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
SICA 18 S 4 CP SPL & Impedance
SICA 18 S 4 CP Dimensions

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