RCF LF18G401
Subwoofer
18″ / 457 mm
Nominal diameter
33 Hz
Resonance
0.29
Q factor
96 dB
Sensitivity
± 9 mm
Linear excursion
1800 W
Program Power
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$$$
Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
96.0
dB
Frequency response
30 - 1000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
33.0
Hz
Mechanical quality factor
QMS
7.60
Electrical quality factor
QES
0.30
Total quality factor
QTS
0.29
Large signal parameters
Maximum linear excursion
xmax
9.0
mm
Maximum excursion before damage
xlim
25.0
mm
Air volume displaced at xmax
VD
1080
cm³
Power handling
P
900
W
Program power
Pmax
1800
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
4.8
Ω
Inductance (1kHz)
LE
1.8
mH
VC Diameter
102
mm
Winding height
HVC
23
mm
Winding material
Copper
Former material
Glass Fiber
Magnet
Force factor
Bl
24.6
N/A
Motor constant
Bl/√RE
11.2
N/√W
Air gap height
HAG
12
mm
Diaphragm
Effective diameter
395
mm
Effective area
SD
1200
cm²
Moving mass
MMS
182
g
Moving mass (without air load)
MMD
152.7
g
Suspensions
Stiffness
KMS
7.81
N/mm
Compliance
CMS
128
µm/N
Equivalent volume to the compliance
VAS
268
L
Mechanical resistance
RMS
4.97
N·s/m
Spider material
with silicon damping
Dimensions
Nominal diameter
18
″
457
mm
Overall diameter
465
mm
Baffle cutout diameter
424
mm
Overall depth
196
mm
Volume occupied by the driver
6.0
L
Net weight
13.0
kg
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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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Bl/√RE
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SD
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fS
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SD
1225 cm²
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QTS
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SPL1W
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