Oberton 15B500
Woofer
15″ / 388 mm
Nominal diameter
38 Hz
Resonance
0.27
Q factor
96 dB
Sensitivity
± 7.25 mm
Linear excursion
1000 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
96.0
dB
Frequency response
38 - 2500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
38.2
Hz
Mechanical quality factor
QMS
12.06
Electrical quality factor
QES
0.27
Total quality factor
QTS
0.27
Large signal parameters
Maximum linear excursion
xmax
7.25
mm
Air volume displaced at xmax
VD
602
cm³
Power handling
P
500
W
Program power
Pmax
1000
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.2
Ω
Inductance (1kHz)
LE
1.25
mH
VC Diameter
77
mm
Winding height
HVC
20
mm
Winding material
Copper
Former material
Glass fiber
Magnet
Flux density
B
1.2
T
Force factor
Bl
22.91
N/A
Motor constant
Bl/√RE
10.0
N/√W
Air gap height
HAG
11
mm
Material
Ferrite
Diaphragm
Effective diameter
325
mm
Effective area
SD
830
cm²
Moving mass
MMS
114.4
g
Moving mass (without air load)
MMD
97.5
g
Material
Paper
Suspensions
Stiffness
KMS
6.58
N/mm
Compliance
CMS
152
µm/N
Equivalent volume to the compliance
VAS
146
L
Mechanical resistance
RMS
2.28
N·s/m
Dimensions
Nominal diameter
15
″
388
mm
Overall diameter
388
mm
Baffle cutout diameter
355
mm
Overall depth
172
mm
Volume occupied by the driver (estimated)
4.1
L
Net weight
7.8
kg
Frame material
Die cast aluminium
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fS
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SD
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35 - 3000 Hz
QTS
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xmax
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SPL1W
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Bl/√RE
9.89
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fS
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SD
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SD
855 cm²
35 - 2000 Hz
QTS
0.28
xmax
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SPL1W
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Bl/√RE
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