18″ / 457 mm
Nominal diameter
30 Hz
Resonance
0.3
Q factor
95 dB
Sensitivity
± 12 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
Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.8
dB
Frequency response
25 - 1000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
30.0
Hz
Mechanical quality factor
QMS
7.40
Electrical quality factor
QES
0.31
Total quality factor
QTS
0.30
Large signal parameters
Maximum linear excursion
xmax
12.0
mm
Maximum excursion before damage
xlim
25.0
mm
Air volume displaced at xmax
VD
1440
cm³
Power handling
P
1200
W
Program power
Pmax
2400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.4
Ω
Inductance (1kHz)
LE
2.5
mH
VC Diameter
102
mm
Winding height
HVC
30
mm
Former material
Glass Fiber
Magnet
Force factor
Bl
26.5
N/A
Motor constant
Bl/√RE
11.4
N/√W
Air gap height
HAG
15
mm
Diaphragm
Effective diameter
395
mm
Effective area
SD
1200
cm²
Moving mass
MMS
215
g
Moving mass (without air load)
MMD
185.7
g
Suspensions
Stiffness
KMS
7.58
N/mm
Compliance
CMS
132
µm/N
Equivalent volume to the compliance
VAS
274
L
Mechanical resistance
RMS
5.48
N·s/m
Spider material
with silicon damping
Dimensions
Nominal diameter
18
″
457
mm
Overall diameter
465
mm
Baffle cutout diameter
424
mm
Volume occupied by the driver
6.5
L
Net weight
12.5
kg
Similar subwoofers to RCF LF18Y402
18″Subwoofer
fS
30 Hz
SD
1210 cm²
35 - 1000 Hz
QTS
0.31
xmax
9.0 mm
SPL1W
94 dB
Bl/√RE
11
Pmax
2400 W
21″Subwoofer
fS
32 Hz
SD
1662 cm²
25 - 1500 Hz
QTS
0.31
xmax
14.0 mm
SPL1W
95 dB
Bl/√RE
15
Pmax
3600 W
18″Subwoofer
fS
30 Hz
SD
1225 cm²
30 - 1000 Hz
QTS
0.33
xmax
13.0 mm
SPL1W
94 dB
Bl/√RE
12
Pmax
3000 W