Celestion FTR12-4080DL
Low frequency
12″ / 305 mm
Nominal diameter
29 Hz
Resonance
0.3
Q factor
88 dB
Sensitivity
± 13.6 mm
Linear excursion
1400 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
88.4
dB
Frequency response
20 - 300
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
28.9
Hz
Mechanical quality factor
QMS
2.47
Electrical quality factor
QES
0.35
Total quality factor
QTS
0.30
Large signal parameters
Maximum linear excursion
xmax
13.6
mm
Air volume displaced at xmax
VD
722
cm³
Power handling
P
700
W
Program power
Pmax
1400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.2
Ω
Inductance (1kHz)
LE
2.07
mH
VC Diameter
100
mm
Winding height
HVC
32
mm
Winding material
Round copper
Former material
Aluminium
Magnet
Force factor
Bl
24.05
N/A
Motor constant
Bl/√RE
9.63
N/√W
Air gap height
HAG
9.5
mm
Weight
3.6
kg
Material
Ferrite
Diaphragm
Effective diameter
260
mm
Effective area
SD
531
cm²
Moving mass
MMS
176.1
g
Moving mass (without air load)
MMD
167.4
g
Material
Glass loaded paper (weather-resistant)
Suspensions
Stiffness
KMS
5.88
N/mm
Compliance
CMS
170
µm/N
Equivalent volume to the compliance
VAS
68.6
L
Mechanical resistance
RMS
12.97
N·s/m
Surround material
Elastomer
Dimensions
Nominal diameter
12
″
305
mm
Overall diameter
313
mm
Baffle cutout diameter
282
mm
Overall depth
169
mm
Volume occupied by the driver (estimated)
4.2
L
Net weight
10.2
kg
Frame material
Cast aluminium
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12″Subwoofer
fS
30 Hz
SD
523 cm²
30 - 2000 Hz
QTS
0.34
xmax
14.0 mm
SPL1W
88 dB
Bl/√RE
9.77
Pmax
2000 W
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8 x 12″Subwoofer
fS
27 Hz
SD
460 cm²
27 - 200 Hz
QTS
0.34
xmax
12.0 mm
SPL1W
88 dB
Bl/√RE
8.14
Pmax
500 W
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