Celestion NTR12-3018D
Low frequency
12″ / 305 mm
Nominal diameter
59 Hz
Resonance
0.3
Q factor
96 dB
Sensitivity
± 4 mm
Linear excursion
700 W
Program Power
Discontinued
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
96.4
dB
Frequency response
50 - 4000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
58.8
Hz
Mechanical quality factor
QMS
3.39
Electrical quality factor
QES
0.33
Total quality factor
QTS
0.30
Large signal parameters
Maximum linear excursion
xmax
4.0
mm
Air volume displaced at xmax
VD
212
cm³
Power handling
P
350
W
Program power
Pmax
700
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.0
Ω
Inductance (1kHz)
LE
0.8
mH
VC Diameter
75
mm
Winding height
HVC
16
mm
Winding material
Round copper
Former material
Glass fibre
Magnet
Force factor
Bl
19.9
N/A
Motor constant
Bl/√RE
8.13
N/√W
Air gap height
HAG
8
mm
Material
Neodymium
Diaphragm
Effective diameter
260
mm
Effective area
SD
531
cm²
Moving mass
MMS
58.1
g
Moving mass (without air load)
MMD
49.3
g
Material
Kevlar loaded paper
Suspensions
Stiffness
KMS
7.69
N/mm
Compliance
CMS
130
µm/N
Equivalent volume to the compliance
VAS
50.4
L
Mechanical resistance
RMS
6.32
N·s/m
Surround material
Cloth-sealed
Dimensions
Nominal diameter
12
″
305
mm
Overall diameter
318
mm
Baffle cutout diameter
286
mm
Overall depth
137
mm
Volume occupied by the driver (estimated)
1.5
L
Net weight
2.6
kg
Frame material
Cast aluminium
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12″Subwoofer
fS
55 Hz
SD
531 cm²
50 - 4600 Hz
QTS
0.27
xmax
7.0 mm
SPL1W
97 dB
Bl/√RE
8.41
Pmax
1200 W
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12″Low frequency
fS
57 Hz
SD
531 cm²
50 - 3000 Hz
QTS
0.32
xmax
7.5 mm
SPL1W
96 dB
Bl/√RE
8.13
Pmax
1000 W