P.Audio 18NT-115XB
Low frequency
18″ / 457 mm
Nominal diameter
40 Hz
Resonance
0.44
Q factor
94 dB
Sensitivity
± 9.8 mm
Linear excursion
3200 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
93.8
dB
Frequency response
35 - 1000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
40.0
Hz
Mechanical quality factor
QMS
13.27
Electrical quality factor
QES
0.45
Total quality factor
QTS
0.44
Large signal parameters
Maximum linear excursion
xmax
9.8
mm
Air volume displaced at xmax
VD
1201
cm³
Power handling
P
1600
W
Program power
Pmax
3200
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.2
Ω
Inductance (1kHz)
LE
0.98
mH
VC Diameter
114
mm
Winding height
HVC
33
mm
Winding material
Copper
Former material
Glass fiber
Magnet
Flux density
B
1.2
T
Force factor
Bl
28.96
N/A
Motor constant
Bl/√RE
12.7
N/√W
Air gap height
HAG
13.5
mm
Material
Neodymium
Diaphragm
Effective diameter
395
mm
Effective area
SD
1225
cm²
Moving mass
MMS
288.3
g
Moving mass (without air load)
MMD
258.3
g
Material
Waterproof Paper
Suspensions
Stiffness
KMS
18.87
N/mm
Compliance
CMS
53
µm/N
Equivalent volume to the compliance
VAS
113
L
Mechanical resistance
RMS
5.46
N·s/m
Surround material
Cloth
Spider material
Double Silicone
Dimensions
Nominal diameter
18
″
457
mm
Overall diameter
466
mm
Baffle cutout diameter
430
mm
Overall depth
253
mm
Flange thickness
21
mm
Mounting depth
232
mm
Volume occupied by the driver (estimated)
7.9
L
Net weight
12.3
kg
Frame material
Aluminium
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SpeakerbenchSimilar speaker drivers to P.Audio 18NT-115XB
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15″Subwoofer
fS
41 Hz
SD
935 cm²
40 - 1000 Hz
QTS
0.40
xmax
7.9 mm
SPL1W
94 dB
Bl/√RE
9.53
Pmax
1600 W
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15″Subwoofer
fS
42 Hz
SD
881 cm²
50 - 2000 Hz
QTS
0.44
xmax
9.0 mm
SPL1W
94 dB
Bl/√RE
9.55
Pmax
3000 W
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15″Low frequency
fS
38 Hz
SD
855 cm²
35 - 1000 Hz
QTS
0.43
xmax
9.0 mm
SPL1W
93 dB
Bl/√RE
8.96
Pmax
2400 W