Celestion CF18VJD

Low frequency

18″ / 457 mm
Nominal diameter
35 Hz
Resonance
0.31
Q factor
94 dB
Sensitivity
± 12 mm
Linear excursion
3200 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
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Specifications

Sensitivity (1W, 1m, infinite baffle)
SPL1W
93.9
dB
Frequency response
25 - 1500
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
34.5
Hz
Mechanical quality factor
QMS
4.57
Electrical quality factor
QES
0.33
Total quality factor
QTS
0.31

Large signal parameters

Maximum linear excursion
xmax
12.0
mm
Air volume displaced at xmax
VD
1361
cm³
Power handling
P
1600
W
Program power
Pmax
3200
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
6.1
Ω
Inductance (1kHz)
LE
1.87
mH
VC Diameter
125
mm
Winding height
HVC
30
mm
Winding material
Round copper
Former material
Glass fibre

Magnet

Force factor
Bl
32.59
N/A
Motor constant
Bl/√RE
13.2
N/√W
Air gap height
HAG
12
mm
Weight
4.93
kg
Material
Ferrite

Diaphragm

Effective diameter
380
mm
Effective area
SD
1134
cm²
Moving mass
MMS
265.4
g
Moving mass (without air load)
MMD
238
g
Material
Carbon and kevlar loaded paper

Suspensions

Stiffness
KMS
12.5
N/mm
Compliance
CMS
80
µm/N
Equivalent volume to the compliance
VAS
146
L
Mechanical resistance
RMS
12.59
N·s/m
Surround material
Cloth-sealed

Dimensions

Nominal diameter
18
457
mm
Overall diameter
462
mm
Baffle cutout diameter
416
mm
Overall depth
233
mm
Volume occupied by the driver (estimated)
11.0
L
Net weight
23.0
kg
Frame material
Cast aluminium
Celestion CF18VJD SPL & Impedance

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