Celestion NTR15-3018E
Low frequency
15″ / 381 mm
Nominal diameter
35 Hz
Resonance
0.28
Q factor
96 dB
Sensitivity
± 5 mm
Linear excursion
900 W
Program Power
Discontinued
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
95.8
dB
Frequency response
30 - 3000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
34.9
Hz
Mechanical quality factor
QMS
4.86
Electrical quality factor
QES
0.30
Total quality factor
QTS
0.28
Large signal parameters
Maximum linear excursion
xmax
5.0
mm
Air volume displaced at xmax
VD
428
cm³
Power handling
P
450
W
Program power
Pmax
900
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.9
Ω
Inductance (1kHz)
LE
1.18
mH
VC Diameter
75
mm
Winding height
HVC
20
mm
Winding material
Edgewound copper
Former material
Glass fibre
Magnet
Force factor
Bl
21.07
N/A
Motor constant
Bl/√RE
8.71
N/√W
Air gap height
HAG
10
mm
Material
Neodymium
Diaphragm
Effective diameter
330
mm
Effective area
SD
855
cm²
Moving mass
MMS
104.1
g
Moving mass (without air load)
MMD
86.8
g
Material
Glass loaded paper (weather-resistant)
Suspensions
Stiffness
KMS
5.0
N/mm
Compliance
CMS
200
µm/N
Equivalent volume to the compliance
VAS
207
L
Mechanical resistance
RMS
4.69
N·s/m
Surround material
Cloth-sealed
Dimensions
Nominal diameter
15
″
381
mm
Overall diameter
386
mm
Baffle cutout diameter
351
mm
Overall depth
162
mm
Volume occupied by the driver (estimated)
2.5
L
Net weight
4.0
kg
Frame material
Cast aluminium
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15″Low frequency
fS
35 Hz
SD
860 cm²
35 - 2000 Hz
QTS
0.29
xmax
6.0 mm
SPL1W
96 dB
Bl/√RE
8.79
Pmax
1200 W
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15″Low frequency
fS
35 Hz
SD
860 cm²
40 - 2500 Hz
QTS
0.26
xmax
6.0 mm
SPL1W
96 dB
Bl/√RE
8.86
Pmax
1400 W
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15″Subwoofer
fS
35 Hz
SD
847 cm²
35 - 3150 Hz
QTS
0.26
xmax
9.3 mm
SPL1W
96 dB
Bl/√RE
9.3
Pmax
1000 W