Celestion CF1230F
Low frequency
12″ / 305 mm
Nominal diameter
57 Hz
Resonance
0.32
Q factor
96 dB
Sensitivity
± 7.5 mm
Linear excursion
1000 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
95.5
dB
Frequency response
50 - 3000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
56.5
Hz
Mechanical quality factor
QMS
4.33
Electrical quality factor
QES
0.34
Total quality factor
QTS
0.32
Large signal parameters
Maximum linear excursion
xmax
7.5
mm
Air volume displaced at xmax
VD
398
cm³
Power handling
P
500
W
Program power
Pmax
1000
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.1
Ω
Inductance (1kHz)
LE
0.74
mH
VC Diameter
75
mm
Winding height
HVC
19
mm
Winding material
Edgewound copper clad aluminium
Former material
Glass fibre
Magnet
Force factor
Bl
18.33
N/A
Motor constant
Bl/√RE
8.13
N/√W
Air gap height
HAG
8
mm
Weight
2.2
kg
Material
Ferrite
Diaphragm
Effective diameter
260
mm
Effective area
SD
531
cm²
Moving mass
MMS
63.8
g
Moving mass (without air load)
MMD
55
g
Material
Glass loaded paper (weather-resistant)
Suspensions
Stiffness
KMS
8.33
N/mm
Compliance
CMS
120
µm/N
Equivalent volume to the compliance
VAS
49.6
L
Mechanical resistance
RMS
5.23
N·s/m
Surround material
Cloth-sealed
Dimensions
Nominal diameter
12
″
305
mm
Overall diameter
315
mm
Baffle cutout diameter
282
mm
Overall depth
153
mm
Volume occupied by the driver (estimated)
3.0
L
Net weight
6.8
kg
Frame material
Cast aluminium
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12″Low frequency
fS
55 Hz
SD
531 cm²
60 - 2500 Hz
QTS
0.32
xmax
2.6 mm
SPL1W
95 dB
Bl/√RE
8.46
Pmax
1200 W
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