Eighteen Sound 18iD

Subwoofer

18″ / 460 mm
Nominal diameter
40 Hz
Resonance
0.26
Q factor
94 dB
Sensitivity
± 15.5 mm
Linear excursion
3600 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
94.1
dB
Frequency response
30 - 2500
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
40.0
Hz
Mechanical quality factor
QMS
5.50
Electrical quality factor
QES
0.27
Total quality factor
QTS
0.26

Large signal parameters

Maximum linear excursion
xmax
15.5
mm
Air volume displaced at xmax
VD
1899
cm³
Power handling
P
1800
W
Program power
Pmax
3600
W

Voice Coil

Nominal impedance
Z
2
Ω
DC resistance
RE
1.5
Ω
Inductance (1kHz)
LE
1.22
mH
VC Diameter
135
mm
Winding material
Copper

Magnet

Force factor
Bl
24.0
N/A
Motor constant
Bl/√RE
19.6
N/√W
Material
Neodymium

Diaphragm

Effective diameter
395
mm
Effective area
SD
1225
cm²
Moving mass
MMS
420
g
Moving mass (without air load)
MMD
390.3
g
Material
Water,UV repellent

Suspensions

Stiffness
KMS
26.32
N/mm
Compliance
CMS
38
µm/N
Equivalent volume to the compliance
VAS
67
L
Mechanical resistance
RMS
19.19
N·s/m

Dimensions

Nominal diameter
18
460
mm
Overall diameter
462
mm
Baffle cutout diameter
416
mm
Overall depth
236
mm
Flange thickness
26
mm
Mounting depth
210
mm
Volume occupied by the driver (estimated)
7.6
L
Net weight
12.5
kg
Eighteen Sound 18iD Impedance
Eighteen Sound 18iD SPL
Eighteen Sound 18iD Dimensions

Export this driver to a simulation software:

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Similar subwoofers to Eighteen Sound 18iD

B&C Speaker 15DS100 Subwoofer
15Subwoofer
fS
39 Hz
SD
855 cm²
39 - 1000 Hz
QTS
0.26
xmax
14.5 mm
SPL1W
94 dB
Bl/√RE
15
Pmax
3000 W