Celestion FTR12-3070C

Low frequency

12″ / 305 mm
Nominal diameter
65 Hz
Resonance
0.32
Q factor
96 dB
Sensitivity
± 5.5 mm
Linear excursion
700 W
Program Power
Celestion FTR12-3070C Low frequencyCelestion FTR12-3070C Low frequency
Impedance
Excursion
Velocity
SPL
Phase
Group delay
Step response
Tone Burst
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
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Specifications

Sensitivity (1w, 1m, infinite baffle)
SPL1W
96.3
dB
Frequency response
40 - 4000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
65.1
Hz
Mechanical quality factor
QMS
2.80
Electrical quality factor
QES
0.36
Total quality factor
QTS
0.32

Large signal parameters

Maximum linear excursion
xmax
5.5
mm
Air volume displaced at xmax
VD
292
cm³
Power handling
P
350
W
Program power
Pmax
700
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.6
Ω
Inductance (1kHz)
LE
1.09
mH
VC Diameter
75
mm
Winding height
HVC
16
mm
Winding material
Round copper
Former material
Glass fibre

Magnet

Force factor
Bl
18.58
N/A
Motor constant
Bl/√RE
7.86
N/√W
Air gap height
HAG
10
mm
Weight
2.3
kg
Material
Ferrite

Diaphragm

Effective diameter
260
mm
Effective area
SD
531
cm²
Moving mass
MMS
54.6
g
Moving mass (without air load)
MMD
45.8
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
43.7
L
Mechanical resistance
RMS
7.96
N·s/m
Surround material
Cloth-sealed

Dimensions

Nominal diameter
12
″
305
mm
Overall diameter
318
mm
Baffle cutout diameter
286
mm
Overall depth
102
mm
Volume occupied by the driver (estimated)
2.2
L
Net weight
6.3
kg
Frame material
Cast aluminium
SPL & Impedance
Celestion FTR12-3070C SPL & Impedance
DatasheetDatasheet

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