Celestion CF1540HD
Low frequency
15″ / 381 mm
Nominal diameter
41 Hz
Resonance
0.31
Q factor
95 dB
Sensitivity
± 10.5 mm
Linear excursion
2400 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.9
dB
Frequency response
35 - 2000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
40.8
Hz
Mechanical quality factor
QMS
5.59
Electrical quality factor
QES
0.32
Total quality factor
QTS
0.31
Large signal parameters
Maximum linear excursion
xmax
10.5
mm
Air volume displaced at xmax
VD
898
cm³
Power handling
P
1200
W
Program power
Pmax
2400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.2
Ω
Inductance (1kHz)
LE
1.22
mH
VC Diameter
100
mm
Winding height
HVC
25
mm
Winding material
Round copper
Former material
Glass fibre
Magnet
Force factor
Bl
24.4
N/A
Motor constant
Bl/√RE
10.8
N/√W
Air gap height
HAG
8
mm
Weight
3.18
kg
Material
Ferrite
Diaphragm
Effective diameter
330
mm
Effective area
SD
855
cm²
Moving mass
MMS
145.5
g
Moving mass (without air load)
MMD
127.9
g
Material
Glass loaded paper (weather-resistant)
Suspensions
Stiffness
KMS
9.09
N/mm
Compliance
CMS
110
µm/N
Equivalent volume to the compliance
VAS
108
L
Mechanical resistance
RMS
6.67
N·s/m
Surround material
Cloth-sealed
Dimensions
Nominal diameter
15
″
381
mm
Overall diameter
393
mm
Baffle cutout diameter
354
mm
Overall depth
184
mm
Volume occupied by the driver (estimated)
5.4
L
Net weight
11.2
kg
Frame material
Cast aluminium
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15″Subwoofer
fS
40 Hz
SD
850 cm²
40 - 2200 Hz
QTS
0.30
xmax
10.0 mm
SPL1W
95 dB
Bl/√RE
10
Pmax
2400 W
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15″Subwoofer
fS
40 Hz
SD
830 cm²
39 - 2000 Hz
QTS
0.31
xmax
12.0 mm
SPL1W
95 dB
Bl/√RE
11
Pmax
2400 W
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15″Subwoofer
fS
40 Hz
SD
842 cm²
40 - 2000 Hz
QTS
0.31
xmax
12.5 mm
SPL1W
95 dB
Bl/√RE
11
Pmax
2000 W