18″ / 457 mm
Nominal diameter
33 Hz
Resonance
0.39
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
35 - 500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
33.0
Hz
Mechanical quality factor
QMS
8.20
Electrical quality factor
QES
0.40
Total quality factor
QTS
0.39
Large signal parameters
Maximum linear excursion
xmax
12.0
mm
Air volume displaced at xmax
VD
1452
cm³
Power handling
P
1200
W
Program power
Pmax
2400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.2
Ω
Inductance (1kHz)
LE
1.5
mH
VC Diameter
102
mm
Winding height
HVC
30
mm
Former material
Glass Fibre
Magnet
Flux density
B
1.1
T
Force factor
Bl
22.4
N/A
Motor constant
Bl/√RE
9.82
N/√W
Air gap height
HAG
11
mm
Weight
4.111
kg
Diaphragm
Effective diameter
392
mm
Effective area
SD
1210
cm²
Moving mass
MMS
188
g
Moving mass (without air load)
MMD
157.4
g
Suspensions
Stiffness
KMS
8.07
N/mm
Compliance
CMS
124
µm/N
Equivalent volume to the compliance
VAS
257
L
Mechanical resistance
RMS
4.75
N·s/m
Surround material
Polyvinyl damped Poly Cotton
Dimensions
Nominal diameter
18
″
457
mm
Overall diameter
485
mm
Baffle cutout diameter
415
mm
Overall depth
216
mm
Flange thickness
12
mm
Mounting depth
204
mm
Volume occupied by the driver (estimated)
8.4
L
Net weight
15.3
kg
Frame material
Die-cast Aluminium
Similar subwoofers to Fane COLOSSUS PRIME 18XS
18″Subwoofer
fS
34 Hz
SD
1255 cm²
35 - 1000 Hz
QTS
0.39
xmax
10.0 mm
SPL1W
95 dB
Bl/√RE
9.74
Pmax
2000 W
21″Subwoofer
fS
31 Hz
SD
1662 cm²
30 - 1800 Hz
QTS
0.36
xmax
17.5 mm
SPL1W
95 dB
Bl/√RE
14
Pmax
4000 W
18″Woofer
fS
32 Hz
SD
1232 cm²
28 - 500 Hz
QTS
0.36
xmax
5.5 mm
SPL1W
95 dB
Bl/√RE
9.89
Pmax
1200 W