Celestion FTX1025

Coaxial

10″ / 254 mm
Nominal diameter
72 Hz
Resonance
0.44
Q factor
94 dB
Sensitivity
± 5 mm
Linear excursion
600 W
Program Power
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
Apply
Sensitivity (1W, 1m, infinite baffle)
SPL1W
94.1
dB
Frequency response
60 - 20000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
71.5
Hz
Mechanical quality factor
QMS
2.79
Electrical quality factor
QES
0.52
Total quality factor
QTS
0.44

Large signal parameters

Maximum linear excursion
xmax
5.0
mm
Air volume displaced at xmax
VD
173
cm³
Power handling
P
300
W
Program power
Pmax
600
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.4
Ω
Inductance (1kHz)
LE
0.48
mH
VC Diameter
64
mm
Winding height
HVC
14
mm
Winding material
Edgewound copper clad aluminium
Former material
Glass fibre

Magnet

Force factor
Bl
12.3
N/A
Motor constant
Bl/√RE
5.28
N/√W
Air gap height
HAG
8
mm
Weight
1.5
kg
Material
Ferrite

Diaphragm

Effective diameter
210
mm
Effective area
SD
346
cm²
Moving mass
MMS
32.6
g
Moving mass (without air load)
MMD
27.9
g

Suspensions

Stiffness
KMS
6.67
N/mm
Compliance
CMS
150
µm/N
Equivalent volume to the compliance
VAS
25.9
L
Mechanical resistance
RMS
5.25
N·s/m
Surround material
Cloth-sealed

Dimensions

Nominal diameter
10
254
mm
Overall diameter
260
mm
Baffle cutout diameter
234
mm
Overall depth
123
mm
Volume occupied by the driver (estimated)
1.8
L
Net weight
4.5
kg
Frame material
Cast aluminium
Celestion FTX1025 SPL & Impedance

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