RCF LF18N451
Subwoofer
18″ / 457 mm
Nominal diameter
31 Hz
Resonance
0.24
Q factor
95 dB
Sensitivity
± 9 mm
Linear excursion
3000 W
Program Power
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Available on (affiliate link)
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$$$
Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
95.4
dB
Frequency response
30 - 1000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
31.0
Hz
Mechanical quality factor
QMS
6.00
Electrical quality factor
QES
0.25
Total quality factor
QTS
0.24
Large signal parameters
Maximum linear excursion
xmax
9.0
mm
Maximum excursion before damage
xlim
30.0
mm
Air volume displaced at xmax
VD
1080
cm³
Power handling
P
1500
W
Program power
Pmax
3000
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.0
Ω
Inductance (1kHz)
LE
2.6
mH
VC Diameter
114
mm
Winding height
HVC
26
mm
Winding material
Copper
Magnet
Force factor
Bl
30.2
N/A
Motor constant
Bl/√RE
13.5
N/√W
Air gap height
HAG
15
mm
Diaphragm
Effective diameter
395
mm
Effective area
SD
1200
cm²
Moving mass
MMS
235
g
Moving mass (without air load)
MMD
205.7
g
Suspensions
Stiffness
KMS
8.85
N/mm
Compliance
CMS
113
µm/N
Equivalent volume to the compliance
VAS
245
L
Mechanical resistance
RMS
7.63
N·s/m
Spider material
with silicon damping
Dimensions
Nominal diameter
18
″
457
mm
Overall diameter
465
mm
Baffle cutout diameter
425
mm
Overall depth
223
mm
Volume occupied by the driver
5.5
L
Net weight
10.5
kg
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