Celestion FTX1225
Coaxial
12″ / 305 mm
Nominal diameter
47 Hz
Resonance
0.4
Q factor
94 dB
Sensitivity
± 6 mm
Linear excursion
600 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.2
dB
Frequency response
50 - 20000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
47.3
Hz
Mechanical quality factor
QMS
4.21
Electrical quality factor
QES
0.44
Total quality factor
QTS
0.40
Large signal parameters
Maximum linear excursion
xmax
6.0
mm
Air volume displaced at xmax
VD
319
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
3.36
mH
VC Diameter
64
mm
Winding height
HVC
16
mm
Winding material
Edgewound copper clad aluminium
Former material
Glass fibre
Magnet
Force factor
Bl
14.0
N/A
Motor constant
Bl/√RE
6.03
N/√W
Air gap height
HAG
8
mm
Weight
2.3
kg
Material
Ferrite
Diaphragm
Effective diameter
260
mm
Effective area
SD
531
cm²
Moving mass
MMS
53.5
g
Moving mass (without air load)
MMD
44.7
g
Material
Kevlar loaded paper
Suspensions
Stiffness
KMS
4.72
N/mm
Compliance
CMS
212
µm/N
Equivalent volume to the compliance
VAS
84.6
L
Mechanical resistance
RMS
3.77
N·s/m
Surround material
Cloth-sealed
Dimensions
Nominal diameter
12
″
305
mm
Overall diameter
318
mm
Baffle cutout diameter
286
mm
Overall depth
168
mm
Volume occupied by the driver (estimated)
3.0
L
Net weight
5.9
kg
Frame material
Cast aluminium
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fS
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SD
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QTS
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SPL1W
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Bl/√RE
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SD
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SD
856 cm²
35 - 200 Hz
QTS
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xmax
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SPL1W
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Bl/√RE
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