P.Audio 18FT-100SW
FT
NTLow frequency
18″ / 457 mm
Nominal diameter
38 Hz
Resonance
0.47
Q factor
95 dB
Sensitivity
± 7.5 mm
Linear excursion
2400 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.5
dB
Frequency response
35 - 1000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
38.0
Hz
Mechanical quality factor
QMS
9.73
Electrical quality factor
QES
0.50
Total quality factor
QTS
0.47
Large signal parameters
Maximum linear excursion
xmax
7.5
mm
Air volume displaced at xmax
VD
919
cm³
Power handling
P
1200
W
Program power
Pmax
2400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.6
Ω
Inductance (1kHz)
LE
1.28
mH
VC Diameter
99
mm
Winding height
HVC
29
mm
Winding material
Copper
Former material
Glass fiber
Magnet
Flux density
B
1.1
T
Force factor
Bl
23.11
N/A
Motor constant
Bl/√RE
9.77
N/√W
Air gap height
HAG
14
mm
Material
Ferrite
Diaphragm
Effective diameter
396
mm
Effective area
SD
1225
cm²
Moving mass
MMS
198.7
g
Moving mass (without air load)
MMD
168.7
g
Material
Waterproof Paper
Suspensions
Stiffness
KMS
11.49
N/mm
Compliance
CMS
87
µm/N
Equivalent volume to the compliance
VAS
186
L
Mechanical resistance
RMS
4.88
N·s/m
Surround material
Cloth
Spider material
Cotton (Double silicone)
Dimensions
Nominal diameter
18
″
457
mm
Overall diameter
466
mm
Baffle cutout diameter
426
mm
Overall depth
251
mm
Flange thickness
23
mm
Mounting depth
228
mm
Volume occupied by the driver (estimated)
8.6
L
Net weight
14.3
kg
Frame material
Aluminium
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15″Coaxial
fS
40 Hz
SD
855 cm²
40 - 18000 Hz
QTS
0.43
xmax
6.5 mm
SPL1W
95 dB
Bl/√RE
6.8
Pmax
800 W
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15″Coaxial
fS
40 Hz
SD
855 cm²
40 - 18000 Hz
QTS
0.44
xmax
6.5 mm
SPL1W
95 dB
Bl/√RE
6.84
Pmax
800 W
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18″Low frequency
fS
39 Hz
SD
1225 cm²
35 - 1000 Hz
QTS
0.52
xmax
5.5 mm
SPL1W
94 dB
Bl/√RE
9.78
Pmax
2000 W