Celestion FTR15-4080F
Low frequency
15″ / 381 mm
Nominal diameter
38 Hz
Resonance
0.25
Q factor
96 dB
Sensitivity
± 8.5 mm
Linear excursion
1200 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
96.1
dB
Frequency response
35 - 3000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
38.0
Hz
Mechanical quality factor
QMS
2.86
Electrical quality factor
QES
0.27
Total quality factor
QTS
0.25
Large signal parameters
Maximum linear excursion
xmax
8.5
mm
Air volume displaced at xmax
VD
727
cm³
Power handling
P
600
W
Program power
Pmax
1200
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.7
Ω
Inductance (1kHz)
LE
1.48
mH
VC Diameter
100
mm
Winding height
HVC
22
mm
Winding material
Round copper
Former material
Glass fibre
Magnet
Force factor
Bl
23.54
N/A
Motor constant
Bl/√RE
9.89
N/√W
Air gap height
HAG
10
mm
Weight
3.1
kg
Material
Ferrite
Diaphragm
Effective diameter
330
mm
Effective area
SD
855
cm²
Moving mass
MMS
111.7
g
Moving mass (without air load)
MMD
94.4
g
Material
Glass loaded paper (weather-resistant)
Suspensions
Stiffness
KMS
6.25
N/mm
Compliance
CMS
160
µm/N
Equivalent volume to the compliance
VAS
163
L
Mechanical resistance
RMS
9.34
N·s/m
Surround material
Cloth-sealed
Dimensions
Nominal diameter
15
″
381
mm
Overall diameter
385
mm
Baffle cutout diameter
351
mm
Overall depth
170
mm
Volume occupied by the driver (estimated)
4.5
L
Net weight
9.4
kg
Frame material
Cast aluminium
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15″Woofer
fS
38 Hz
SD
830 cm²
38 - 2500 Hz
QTS
0.27
xmax
7.3 mm
SPL1W
96 dB
Bl/√RE
10.0
Pmax
1000 W
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15″Subwoofer
fS
38 Hz
SD
855 cm²
35 - 2000 Hz
QTS
0.28
xmax
8.5 mm
SPL1W
95 dB
Bl/√RE
11
Pmax
2400 W