RCF LF18N401
Subwoofer
18″ / 457 mm
Nominal diameter
32 Hz
Resonance
0.26
Q factor
96 dB
Sensitivity
± 9 mm
Linear excursion
2400 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
95.9
dB
Frequency response
30 - 1000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
32.0
Hz
Mechanical quality factor
QMS
6.50
Electrical quality factor
QES
0.27
Total quality factor
QTS
0.26
Large signal parameters
Maximum linear excursion
xmax
9.0
mm
Maximum excursion before damage
xlim
26.0
mm
Air volume displaced at xmax
VD
1080
cm³
Power handling
P
1200
W
Program power
Pmax
2400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.1
Ω
Inductance (1kHz)
LE
2.5
mH
VC Diameter
102
mm
Winding height
HVC
25
mm
Winding material
Copper
Former material
Glass Fiber
Magnet
Force factor
Bl
27.8
N/A
Motor constant
Bl/√RE
12.3
N/√W
Air gap height
HAG
15
mm
Diaphragm
Effective diameter
395
mm
Effective area
SD
1200
cm²
Moving mass
MMS
201
g
Moving mass (without air load)
MMD
171.7
g
Suspensions
Stiffness
KMS
8.2
N/mm
Compliance
CMS
122
µm/N
Equivalent volume to the compliance
VAS
257
L
Mechanical resistance
RMS
6.22
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
204
mm
Volume occupied by the driver
5.5
L
Net weight
9.5
kg
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fS
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SD
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30 - 1000 Hz
QTS
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xmax
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SPL1W
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Bl/√RE
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fS
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SD
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fS
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SD
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40 - 2000 Hz
QTS
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xmax
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SPL1W
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Bl/√RE
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