Celestion TF1525e
Low frequency
15″ / 381 mm
Nominal diameter
48 Hz
Resonance
0.47
Q factor
96 dB
Sensitivity
± 5.25 mm
Linear excursion
600 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
95.5
dB
Frequency response
45 - 3500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
47.5
Hz
Mechanical quality factor
QMS
4.49
Electrical quality factor
QES
0.53
Total quality factor
QTS
0.47
Large signal parameters
Maximum linear excursion
xmax
5.25
mm
Air volume displaced at xmax
VD
449
cm³
Power handling
P
300
W
Program power
Pmax
600
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.8
Ω
Inductance (1kHz)
LE
1.31
mH
VC Diameter
64
mm
Winding height
HVC
14.5
mm
Winding material
Edgewound copper
Former material
Glass fibre
Magnet
Force factor
Bl
17.78
N/A
Motor constant
Bl/√RE
6.81
N/√W
Air gap height
HAG
8
mm
Weight
1.4
kg
Material
Ferrite
Diaphragm
Effective diameter
330
mm
Effective area
SD
855
cm²
Moving mass
MMS
82.1
g
Moving mass (without air load)
MMD
64.8
g
Material
Kevlar loaded paper
Suspensions
Stiffness
KMS
7.14
N/mm
Compliance
CMS
140
µm/N
Equivalent volume to the compliance
VAS
142
L
Mechanical resistance
RMS
5.46
N·s/m
Surround material
Cloth-sealed
Dimensions
Nominal diameter
15
″
381
mm
Overall diameter
385
mm
Baffle cutout diameter
352
mm
Overall depth
163
mm
Volume occupied by the driver (estimated)
2.9
L
Net weight
4.8
kg
Frame material
Pressed steel
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fS
46 Hz
SD
880 cm²
50 - 4000 Hz
QTS
0.48
xmax
8.0 mm
SPL1W
95 dB
Bl/√RE
7.44
Pmax
1000 W
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15″Low frequency
fS
48 Hz
SD
855 cm²
40 - 3000 Hz
QTS
0.49
xmax
4.5 mm
SPL1W
96 dB
Bl/√RE
6.42
Pmax
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fS
46 Hz
SD
880 cm²
50 - 4000 Hz
QTS
0.44
xmax
8.0 mm
SPL1W
96 dB
Bl/√RE
7.73
Pmax
1000 W