12″ / 305 mm
Nominal diameter
57 Hz
Resonance
0.39
Q factor
95 dB
Sensitivity
± 6 mm
Linear excursion
700 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
Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.7
dB
Frequency response
50 - 4000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
56.8
Hz
Mechanical quality factor
QMS
3.64
Electrical quality factor
QES
0.44
Total quality factor
QTS
0.39
Large signal parameters
Maximum linear excursion
xmax
6.0
mm
Air volume displaced at xmax
VD
319
cm³
Power handling
P
350
W
Program power
Pmax
700
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.2
Ω
Inductance (1kHz)
LE
0.89
mH
VC Diameter
75
mm
Winding height
HVC
16
mm
Winding material
Round copper
Magnet
Force factor
Bl
15.68
N/A
Motor constant
Bl/√RE
6.9
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
58.3
g
Moving mass (without air load)
MMD
49.7
g
Material
Kevlar loaded paper
Suspensions
Stiffness
KMS
7.14
N/mm
Compliance
CMS
140
µm/N
Equivalent volume to the compliance
VAS
53.8
L
Mechanical resistance
RMS
5.72
N·s/m
Surround material
Cloth-sealed
Dimensions
Nominal diameter
12
″
305
mm
Overall diameter
309
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 TF1230SL
12″Mid Bass
fS
54 Hz
SD
515 cm²
50 - 3000 Hz
QTS
0.36
xmax
6.8 mm
SPL1W
95 dB
Bl/√RE
7.25
Pmax
1200 W
12″Mid Bass
fS
55 Hz
SD
530 cm²
40 - 4000 Hz
QTS
0.40
xmax
5.5 mm
SPL1W
95 dB
Bl/√RE
7.08
Pmax
1000 W
12″Coaxial
fS
55 Hz
SD
540 cm²
55 - 22000 Hz
QTS
0.33
xmax
3.0 mm
SPL1W
95 dB
Bl/√RE
7.14
Pmax
500 W