RCF LF18G400
Woofer
18″ / 457 mm
Nominal diameter
28 Hz
Resonance
0.27
Q factor
95 dB
Sensitivity
± 9 mm
Linear excursion
2000 W
Program Power
Discontinued
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
95.4
dB
Frequency response
25 - 1000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
28.0
Hz
Mechanical quality factor
QMS
4.60
Electrical quality factor
QES
0.29
Total quality factor
QTS
0.27
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
1000
W
Program power
Pmax
2000
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.1
Ω
Inductance (1kHz)
LE
1.2
mH
VC Diameter
102
mm
Winding height
HVC
25
mm
Winding material
Copper
Magnet
Force factor
Bl
24.2
N/A
Motor constant
Bl/√RE
10.7
N/√W
Material
Ceramic
Diaphragm
Effective diameter
395
mm
Effective area
SD
1200
cm²
Moving mass
MMS
190
g
Moving mass (without air load)
MMD
160.7
g
Suspensions
Stiffness
KMS
5.68
N/mm
Compliance
CMS
176
µm/N
Equivalent volume to the compliance
VAS
360
L
Mechanical resistance
RMS
7.27
N·s/m
Surround material
Polycotton
Dimensions
Nominal diameter
18
″
457
mm
Overall diameter
465
mm
Baffle cutout diameter
424
mm
Overall depth
228
mm
Flange thickness
14
mm
Mounting depth
214
mm
Volume occupied by the driver
7.0
L
Net weight
13.3
kg
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SpeakerbenchSimilar subwoofers to RCF LF18G400
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RCF L18P4008 Ω
18″Subwoofer
fS
29 Hz
SD
1200 cm²
25 - 1000 Hz
QTS
0.28
xmax
9.0 mm
SPL1W
95 dB
Bl/√RE
11
Pmax
2000 W
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21″Subwoofer
fS
30 Hz
SD
1698 cm²
30 - 1000 Hz
QTS
0.27
xmax
10.5 mm
SPL1W
96 dB
Bl/√RE
16
Pmax
2000 W