Celestion FTR15-4080HDX
Low frequency
15″ / 381 mm
Nominal diameter
40 Hz
Resonance
0.32
Q factor
94 dB
Sensitivity
± 10.1 mm
Linear excursion
2000 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.1
dB
Frequency response
40 - 2500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
40.0
Hz
Mechanical quality factor
QMS
3.09
Electrical quality factor
QES
0.36
Total quality factor
QTS
0.32
Large signal parameters
Maximum linear excursion
xmax
10.1
mm
Air volume displaced at xmax
VD
864
cm³
Power handling
P
1000
W
Program power
Pmax
2000
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.1
Ω
Inductance (1kHz)
LE
1.73
mH
VC Diameter
100
mm
Winding height
HVC
25
mm
Winding material
Round copper
Former material
Glass fibre
Magnet
Force factor
Bl
23.07
N/A
Motor constant
Bl/√RE
10.2
N/√W
Air gap height
HAG
9.5
mm
Weight
3.1
kg
Material
Ferrite
Diaphragm
Effective diameter
330
mm
Effective area
SD
855
cm²
Moving mass
MMS
147.5
g
Moving mass (without air load)
MMD
130.1
g
Material
Glass loaded paper (weather-resistant)
Suspensions
Stiffness
KMS
9.09
N/mm
Compliance
CMS
110
µm/N
Equivalent volume to the compliance
VAS
111
L
Mechanical resistance
RMS
13.77
N·s/m
Surround material
Cloth-sealed
Dimensions
Nominal diameter
15
″
381
mm
Overall diameter
385
mm
Baffle cutout diameter
351
mm
Overall depth
180
mm
Volume occupied by the driver (estimated)
4.8
L
Net weight
9.7
kg
Frame material
Cast aluminium
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fS
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SD
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40 - 2000 Hz
QTS
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xmax
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SPL1W
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Bl/√RE
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fS
38 Hz
SD
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40 - 1500 Hz
QTS
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xmax
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SPL1W
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Bl/√RE
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Pmax
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fS
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SD
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37 - 2000 Hz
QTS
0.28
xmax
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SPL1W
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Bl/√RE
11
Pmax
2000 W