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
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
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
Similar speaker drivers to Celestion TF1230S
12″Woofer
fS
55 Hz
SD
531 cm²
QTS
0.35
xmax
4.5 mm
SPL1W
96 dB
Bl/√RE
7.37
Pmax
600 W
12″Subwoofer
fS
57 Hz
SD
550 cm²
65 - 5000 Hz
QTS
0.36
xmax
8.0 mm
SPL1W
96 dB
Bl/√RE
7.44
Pmax
1000 W
12″Low frequency
fS
56 Hz
SD
531 cm²
50 - 5000 Hz
QTS
0.40
xmax
3.9 mm
SPL1W
96 dB
Bl/√RE
6.9
Pmax
800 W