Oberton 18B500
Woofer
18″ / 461 mm
Nominal diameter
35 Hz
Resonance
0.28
Q factor
97 dB
Sensitivity
± 8.75 mm
Linear excursion
1200 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
96.8
dB
Frequency response
35 - 1000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
34.9
Hz
Mechanical quality factor
QMS
9.24
Electrical quality factor
QES
0.28
Total quality factor
QTS
0.28
Large signal parameters
Maximum linear excursion
xmax
8.75
mm
Air volume displaced at xmax
VD
971
cm³
Power handling
P
600
W
Program power
Pmax
1200
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.1
Ω
Inductance (1kHz)
LE
1.37
mH
VC Diameter
77
mm
Winding height
HVC
23
mm
Winding material
Copper
Former material
Glass fiber
Magnet
Flux density
B
1.27
T
Force factor
Bl
24.06
N/A
Motor constant
Bl/√RE
10.7
N/√W
Air gap height
HAG
11
mm
Material
Ferrite
Diaphragm
Effective diameter
376
mm
Effective area
SD
1110
cm²
Moving mass
MMS
146.8
g
Moving mass (without air load)
MMD
120.1
g
Material
Paper
Suspensions
Stiffness
KMS
7.04
N/mm
Compliance
CMS
142
µm/N
Equivalent volume to the compliance
VAS
244
L
Mechanical resistance
RMS
3.48
N·s/m
Dimensions
Nominal diameter
18
″
461
mm
Overall diameter
461
mm
Baffle cutout diameter
417
mm
Overall depth
202
mm
Volume occupied by the driver (estimated)
6.8
L
Net weight
12.3
kg
Frame material
Die cast aluminium
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SpeakerbenchSimilar subwoofers to Oberton 18B500
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18″Woofer
fS
36 Hz
SD
1110 cm²
40 - 2000 Hz
QTS
0.27
xmax
8.0 mm
SPL1W
97 dB
Bl/√RE
11
Pmax
1400 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
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15″Subwoofer
fS
36 Hz
SD
880 cm²
40 - 4000 Hz
QTS
0.30
xmax
6.3 mm
SPL1W
97 dB
Bl/√RE
8.11
Pmax
800 W