Oberton 18FBR700
Woofer
18″ / 461 mm
Nominal diameter
36 Hz
Resonance
0.27
Q factor
97 dB
Sensitivity
± 8 mm
Linear excursion
1400 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
96.9
dB
Frequency response
40 - 2000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
35.6
Hz
Mechanical quality factor
QMS
12.63
Electrical quality factor
QES
0.28
Total quality factor
QTS
0.27
Large signal parameters
Maximum linear excursion
xmax
8.0
mm
Air volume displaced at xmax
VD
888
cm³
Power handling
P
700
W
Program power
Pmax
1400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.3
Ω
Inductance (1kHz)
LE
1.5
mH
VC Diameter
100
mm
Winding height
HVC
23
mm
Winding material
Aluminium
Former material
Glass fiber
Magnet
Flux density
B
1.03
T
Force factor
Bl
25.17
N/A
Motor constant
Bl/√RE
11.0
N/√W
Air gap height
HAG
14
mm
Material
Ferrite
Diaphragm
Effective diameter
376
mm
Effective area
SD
1110
cm²
Moving mass
MMS
149.1
g
Moving mass (without air load)
MMD
122.4
g
Material
Paper with carbone fibers
Suspensions
Stiffness
KMS
7.46
N/mm
Compliance
CMS
134
µm/N
Equivalent volume to the compliance
VAS
231
L
Mechanical resistance
RMS
2.64
N·s/m
Dimensions
Nominal diameter
18
″
461
mm
Overall diameter
461
mm
Baffle cutout diameter
417
mm
Overall depth
205
mm
Volume occupied by the driver (estimated)
7.0
L
Net weight
12.9
kg
Frame material
Die cast aluminium
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SpeakerbenchSimilar subwoofers to Oberton 18FBR700
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18″Woofer
fS
35 Hz
SD
1110 cm²
35 - 1000 Hz
QTS
0.28
xmax
8.8 mm
SPL1W
97 dB
Bl/√RE
11
Pmax
1200 W
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15″Subwoofer
fS
38 Hz
SD
850 cm²
38 - 5000 Hz
QTS
0.30
xmax
6.5 mm
SPL1W
97 dB
Bl/√RE
7.71
Pmax
700 W
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18″Subwoofer
fS
37 Hz
SD
1134 cm²
37 - 3000 Hz
QTS
0.25
xmax
7.0 mm
SPL1W
98 dB
Bl/√RE
11
Pmax
2400 W