Oberton 18B35
Subwoofer
18″ / 461 mm
Nominal diameter
32 Hz
Resonance
0.32
Q factor
97 dB
Sensitivity
± 9 mm
Linear excursion
1400 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
97.4
dB
Frequency response
32 - 1000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
31.8
Hz
Mechanical quality factor
QMS
8.05
Electrical quality factor
QES
0.34
Total quality factor
QTS
0.32
Large signal parameters
Maximum linear excursion
xmax
9.0
mm
Air volume displaced at xmax
VD
999
cm³
Power handling
P
700
W
Program power
Pmax
1400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
4.9
Ω
Inductance (1kHz)
LE
0.61
mH
VC Diameter
88
mm
Winding height
HVC
24
mm
Winding material
Copper Clad Aluminium
Former material
Glass fiber
Magnet
Flux density
B
1.06
T
Force factor
Bl
19.34
N/A
Motor constant
Bl/√RE
8.75
N/√W
Air gap height
HAG
12
mm
Material
Ferrite
Diaphragm
Effective diameter
376
mm
Effective area
SD
1110
cm²
Moving mass
MMS
129.6
g
Moving mass (without air load)
MMD
102.8
g
Material
Paper
Suspensions
Stiffness
KMS
5.16
N/mm
Compliance
CMS
194
µm/N
Equivalent volume to the compliance
VAS
334
L
Mechanical resistance
RMS
3.21
N·s/m
Dimensions
Nominal diameter
18
″
461
mm
Overall diameter
461
mm
Baffle cutout diameter
417
mm
Overall depth
196
mm
Volume occupied by the driver (estimated)
5.8
L
Net weight
10.0
kg
Frame material
Die cast aluminium
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SD
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SD
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xmax
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SPL1W
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