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
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
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
Celestion FTR12-4080DL SPL & Impedance

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