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
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply
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
Oberton 18B35 SPL
Oberton 18B35 Dimensions

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