Oberton 18NXB700
Woofer
18″ / 461 mm
Nominal diameter
36 Hz
Resonance
0.31
Q factor
95 dB
Sensitivity
± 9 mm
Linear excursion
2000 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.9
dB
Frequency response
36 - 1000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
36.2
Hz
Mechanical quality factor
QMS
7.94
Electrical quality factor
QES
0.33
Total quality factor
QTS
0.31
Large signal parameters
Maximum linear excursion
xmax
9.0
mm
Air volume displaced at xmax
VD
999
cm³
Power handling
P
1000
W
Program power
Pmax
2000
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.2
Ω
Inductance (1kHz)
LE
1.97
mH
VC Diameter
100
mm
Winding height
HVC
25
mm
Winding material
Copper
Former material
Glass fiber
Magnet
Flux density
B
1.0
T
Force factor
Bl
27.82
N/A
Motor constant
Bl/√RE
12.2
N/√W
Air gap height
HAG
14
mm
Material
Neodymium
Diaphragm
Effective diameter
376
mm
Effective area
SD
1110
cm²
Moving mass
MMS
213.6
g
Moving mass (without air load)
MMD
186.9
g
Material
Kevlar paper
Suspensions
Stiffness
KMS
11.11
N/mm
Compliance
CMS
90
µm/N
Equivalent volume to the compliance
VAS
155
L
Mechanical resistance
RMS
6.13
N·s/m
Dimensions
Nominal diameter
18
″
461
mm
Overall diameter
461
mm
Baffle cutout diameter
417
mm
Overall depth
223
mm
Volume occupied by the driver (estimated)
5.9
L
Net weight
8.95
kg
Frame material
Die cast aluminium
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fS
36 Hz
SD
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30 - 500 Hz
QTS
0.31
xmax
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SPL1W
95 dB
Bl/√RE
9.69
Pmax
2000 W
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fS
35 Hz
SD
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30 - 1000 Hz
QTS
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xmax
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SPL1W
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Bl/√RE
14
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fS
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SD
1164 cm²
30 - 800 Hz
QTS
0.27
xmax
8.5 mm
SPL1W
96 dB
Bl/√RE
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Pmax
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