Eighteen Sound 18LW2420 8Ω

Subwoofer

18″ / 462 mm
Nominal diameter
34 Hz
Resonance
0.36
Q factor
95 dB
Sensitivity
± 10 mm
Linear excursion
2600 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
Discard
Apply
Sensitivity (1W, 1m, infinite baffle)
SPL1W
95.0
dB
Frequency response
30 - 2500
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
34.0
Hz
Mechanical quality factor
QMS
6.30
Electrical quality factor
QES
0.38
Total quality factor
QTS
0.36

Large signal parameters

Maximum linear excursion
xmax
10.0
mm
Air volume displaced at xmax
VD
1225
cm³
Power handling
P
1300
W
Program power
Pmax
2600
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.2
Ω
Inductance (1kHz)
LE
1.5
mH
VC Diameter
100
mm

Magnet

Force factor
Bl
25.5
N/A
Motor constant
Bl/√RE
11.2
N/√W

Diaphragm

Effective diameter
395
mm
Effective area
SD
1225
cm²
Moving mass
MMS
210
g
Moving mass (without air load)
MMD
180.3
g

Suspensions

Stiffness
KMS
9.62
N/mm
Compliance
CMS
104
µm/N
Equivalent volume to the compliance
VAS
196
L
Mechanical resistance
RMS
7.12
N·s/m

Dimensions

Nominal diameter
18
462
mm
Overall diameter
462
mm
Baffle cutout diameter
422
mm
Overall depth
215
mm
Flange thickness
24
mm
Mounting depth
191
mm
Volume occupied by the driver (estimated)
7.1
L
Net weight
12.4
kg
Eighteen Sound 18LW2420 8Ω Impedance
Eighteen Sound 18LW2420 8Ω SPL
Eighteen Sound 18LW2420 8Ω Dimensions

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