Celestion TF1230S

Low frequency

12″ / 305 mm
Nominal diameter
60 Hz
Resonance
0.37
Q factor
96 dB
Sensitivity
± 4.5 mm
Linear excursion
600 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
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Specifications

Sensitivity (1W, 1m, infinite baffle)
SPL1W
95.6
dB
Frequency response
50 - 4000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
60.3
Hz
Mechanical quality factor
QMS
3.28
Electrical quality factor
QES
0.42
Total quality factor
QTS
0.37

Large signal parameters

Maximum linear excursion
xmax
4.5
mm
Air volume displaced at xmax
VD
239
cm³
Power handling
P
300
W
Program power
Pmax
600
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
6.0
Ω
Inductance (1kHz)
LE
0.98
mH
VC Diameter
75
mm
Winding height
HVC
17
mm
Winding material
Edgewound copper clad aluminium
Former material
Polyimide

Magnet

Force factor
Bl
16.56
N/A
Motor constant
Bl/√RE
6.77
N/√W
Air gap height
HAG
8
mm
Weight
1.7
kg
Material
Ferrite

Diaphragm

Effective diameter
260
mm
Effective area
SD
531
cm²
Moving mass
MMS
51.1
g
Moving mass (without air load)
MMD
42.3
g
Material
Kevlar loaded paper

Suspensions

Stiffness
KMS
7.14
N/mm
Compliance
CMS
140
µm/N
Equivalent volume to the compliance
VAS
54.4
L
Mechanical resistance
RMS
5.91
N·s/m
Surround material
Cloth-sealed

Dimensions

Nominal diameter
12
305
mm
Overall diameter
318
mm
Baffle cutout diameter
283
mm
Overall depth
137
mm
Volume occupied by the driver (estimated)
2.1
L
Net weight
4.3
kg
Frame material
Pressed steel
Celestion TF1230S SPL & Impedance

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