Celestion TF1225e

Low frequency

12″ / 305 mm
Nominal diameter
53 Hz
Resonance
0.33
Q factor
95 dB
Sensitivity
± 5.25 mm
Linear excursion
600 W
Program Power
Celestion TF1225e Low frequencyCelestion TF1225e 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
95.3
dB
Frequency response
50 - 3000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
52.6
Hz
Mechanical quality factor
QMS
3.51
Electrical quality factor
QES
0.37
Total quality factor
QTS
0.33

Large signal parameters

Maximum linear excursion
xmax
5.25
mm
Air volume displaced at xmax
VD
279
cm³
Power handling
P
300
W
Program power
Pmax
600
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
6.4
Ω
Inductance (1kHz)
LE
1.32
mH
VC Diameter
64
mm
Winding height
HVC
14.5
mm
Winding material
Edgewound copper
Former material
Polyimide

Magnet

Force factor
Bl
17.66
N/A
Motor constant
Bl/√RE
6.97
N/√W
Air gap height
HAG
8
mm
Weight
1.4
kg
Material
Ferrite

Diaphragm

Effective diameter
260
mm
Effective area
SD
531
cm²
Moving mass
MMS
54
g
Moving mass (without air load)
MMD
45.4
g
Material
Kevlar loaded paper

Suspensions

Stiffness
KMS
5.88
N/mm
Compliance
CMS
170
µm/N
Equivalent volume to the compliance
VAS
67.7
L
Mechanical resistance
RMS
5.08
N·s/m
Surround material
Cloth-sealed

Dimensions

Nominal diameter
12
″
305
mm
Overall diameter
309
mm
Baffle cutout diameter
283
mm
Overall depth
139
mm
Volume occupied by the driver (estimated)
2.1
L
Net weight
4.4
kg
Frame material
Pressed steel
SPL & Impedance
Celestion TF1225e SPL & Impedance
DatasheetDatasheet

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