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
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
94.7
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
Celestion CF1025C SPL & Impedance

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