Celestion TN1225
Mid Bass
12″ / 305 mm
Nominal diameter
61 Hz
Resonance
0.31
Q factor
98 dB
Sensitivity
± 2.5 mm
Linear excursion
500 W
Program Power
Discontinued
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
97.8
dB
Frequency response
50 - 4000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
61.4
Hz
Mechanical quality factor
QMS
3.12
Electrical quality factor
QES
0.34
Total quality factor
QTS
0.31
Large signal parameters
Maximum linear excursion
xmax
2.5
mm
Air volume displaced at xmax
VD
133
cm³
Power handling
P
250
W
Program power
Pmax
500
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.2
Ω
Inductance (1kHz)
LE
0.65
mH
VC Diameter
64
mm
Winding height
HVC
13
mm
Winding material
Round copper
Former material
Polyimide
Magnet
Force factor
Bl
15.79
N/A
Motor constant
Bl/√RE
6.92
N/√W
Air gap height
HAG
8
mm
Material
Neodymium
Diaphragm
Effective diameter
260
mm
Effective area
SD
531
cm²
Moving mass
MMS
42.1
g
Moving mass (without air load)
MMD
33.5
g
Material
Kevlar loaded paper
Suspensions
Stiffness
KMS
6.25
N/mm
Compliance
CMS
160
µm/N
Equivalent volume to the compliance
VAS
63.7
L
Mechanical resistance
RMS
5.21
N·s/m
Surround material
Cloth-sealed
Dimensions
Nominal diameter
12
″
305
mm
Overall diameter
309
mm
Baffle cutout diameter
283
mm
Overall depth
132
mm
Volume occupied by the driver (estimated)
1.2
L
Net weight
2.0
kg
Frame material
Pressed steel
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12″Coaxial
fS
58 Hz
SD
515 cm²
60 - 16000 Hz
QTS
0.30
xmax
5.3 mm
SPL1W
98 dB
Bl/√RE
7.2
Pmax
700 W
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12″Coaxial
fS
58 Hz
SD
531 cm²
60 - 4000 Hz
QTS
0.29
xmax
5.5 mm
SPL1W
98 dB
Bl/√RE
7.53
Pmax
800 W
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12″Coaxial
fS
58 Hz
SD
531 cm²
60 - 5000 Hz
QTS
0.29
xmax
5.5 mm
SPL1W
98 dB
Bl/√RE
7.53
Pmax
800 W