Celestion TF1525

Low frequency

15″ / 381 mm
Nominal diameter
48 Hz
Resonance
0.49
Q factor
96 dB
Sensitivity
± 4.5 mm
Linear excursion
500 W
Program Power
Celestion TF1525 Low frequencyCelestion TF1525 Low frequencyCelestion TF1525 Low frequency
Impedance
Excursion
Velocity
SPL
Phase
Group delay
Step response
Tone Burst
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
Discard
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Specifications

Sensitivity (1W, 1m, infinite baffle)
SPL1W
95.6
dB
Frequency response
40 - 3000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
47.6
Hz
Mechanical quality factor
QMS
3.84
Electrical quality factor
QES
0.56
Total quality factor
QTS
0.49

Large signal parameters

Maximum linear excursion
xmax
4.5
mm
Air volume displaced at xmax
VD
385
cm³
Power handling
P
250
W
Program power
Pmax
500
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.2
Ω
Inductance (1kHz)
LE
0.9
mH
VC Diameter
64
mm
Winding height
HVC
13
mm
Winding material
Round copper
Former material
Polyimide

Magnet

Force factor
Bl
14.57
N/A
Motor constant
Bl/√RE
6.42
N/√W
Air gap height
HAG
8
mm
Weight
1.2
kg
Material
Ferrite

Diaphragm

Effective diameter
330
mm
Effective area
SD
855
cm²
Moving mass
MMS
77.9
g
Moving mass (without air load)
MMD
60.6
g
Material
Kevlar loaded paper

Suspensions

Stiffness
KMS
7.14
N/mm
Compliance
CMS
140
µm/N
Equivalent volume to the compliance
VAS
148
L
Mechanical resistance
RMS
6.08
N·s/m
Surround material
Cloth-sealed

Dimensions

Nominal diameter
15
″
381
mm
Overall diameter
385
mm
Baffle cutout diameter
351
mm
Overall depth
153
mm
Volume occupied by the driver (estimated)
2.9
L
Net weight
5.2
kg
Frame material
Pressed steel
SPL & Impedance
Celestion TF1525 SPL & Impedance
Celestion TF1525 Dimensions
DatasheetDatasheet

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