Celestion CF1025C
Low frequency
10″ / 254 mm
Nominal diameter
55 Hz
Resonance
0.27
Q factor
95 dB
Sensitivity
± 4.25 mm
Linear excursion
600 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.7
dB
Frequency response
60 - 5000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
54.8
Hz
Mechanical quality factor
QMS
2.34
Electrical quality factor
QES
0.30
Total quality factor
QTS
0.27
Large signal parameters
Maximum linear excursion
xmax
4.25
mm
Air volume displaced at xmax
VD
147
cm³
Power handling
P
300
W
Program power
Pmax
600
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.2
Ω
Inductance (1kHz)
LE
0.57
mH
VC Diameter
64
mm
Winding height
HVC
12.5
mm
Winding material
Edgewound copper clad aluminium
Former material
Glass fibre
Magnet
Force factor
Bl
14.82
N/A
Motor constant
Bl/√RE
6.53
N/√W
Air gap height
HAG
8
mm
Weight
1.7
kg
Material
Ferrite
Diaphragm
Effective diameter
210
mm
Effective area
SD
346
cm²
Moving mass
MMS
37
g
Moving mass (without air load)
MMD
32.3
g
Material
Kevlar loaded paper
Suspensions
Stiffness
KMS
4.35
N/mm
Compliance
CMS
230
µm/N
Equivalent volume to the compliance
VAS
38.6
L
Mechanical resistance
RMS
5.46
N·s/m
Surround material
Cloth-sealed
Dimensions
Nominal diameter
10
″
254
mm
Overall diameter
265
mm
Baffle cutout diameter
231
mm
Overall depth
119
mm
Volume occupied by the driver (estimated)
1.9
L
Net weight
4.9
kg
Frame material
Cast aluminium
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10″Woofer
fS
51 Hz
SD
346 cm²
50 - 3000 Hz
QTS
0.26
xmax
6.5 mm
SPL1W
94 dB
Bl/√RE
7.04
Pmax
800 W
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8″Woofer
fS
59 Hz
SD
227 cm²
60 - 5500 Hz
QTS
0.31
xmax
5.8 mm
SPL1W
94 dB
Bl/√RE
4.34
Pmax
400 W