Oberton 8NB201
Mid-range
8″ / 210 mm
Nominal diameter
71 Hz
Resonance
0.25
Q factor
94 dB
Sensitivity
± 5.25 mm
Linear excursion
400 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.0
dB
Frequency response
65 - 3000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
70.6
Hz
Mechanical quality factor
QMS
5.97
Electrical quality factor
QES
0.26
Total quality factor
QTS
0.25
Large signal parameters
Maximum linear excursion
xmax
5.25
mm
Air volume displaced at xmax
VD
106
cm³
Power handling
P
200
W
Program power
Pmax
400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.3
Ω
Inductance (1kHz)
LE
0.96
mH
VC Diameter
51
mm
Winding height
HVC
14
mm
Winding material
Copper
Former material
Kapton
Magnet
Flux density
B
1.25
T
Force factor
Bl
14.41
N/A
Motor constant
Bl/√RE
6.28
N/√W
Air gap height
HAG
7
mm
Material
Neodymium
Diaphragm
Effective diameter
160
mm
Effective area
SD
202
cm²
Moving mass
MMS
22.7
g
Moving mass (without air load)
MMD
20.4
g
Material
Paper with glassfiber
Suspensions
Stiffness
KMS
4.46
N/mm
Compliance
CMS
224
µm/N
Equivalent volume to the compliance
VAS
12.5
L
Mechanical resistance
RMS
1.68
N·s/m
Dimensions
Nominal diameter
8
″
210
mm
Overall diameter
225
mm
Baffle cutout diameter
187
mm
Overall depth
89
mm
Volume occupied by the driver (estimated)
0.88
L
Net weight
2.38
kg
Frame material
Die cast aluminium
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QSpeakers
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MfbLabs
SpeakerbenchSimilar woofers to Oberton 8NB201
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8″Mid Bass
fS
70 Hz
SD
220 cm²
70 - 4000 Hz
QTS
0.20
xmax
6.0 mm
SPL1W
95 dB
Bl/√RE
6.77
Pmax
400 W
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8″Woofer
fS
74 Hz
SD
227 cm²
60 - 3000 Hz
QTS
0.26
xmax
4.4 mm
SPL1W
94 dB
Bl/√RE
6.72
Pmax
700 W
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10″Subwoofer
fS
60 Hz
SD
345 cm²
60 - 2500 Hz
QTS
0.24
xmax
9.0 mm
SPL1W
93 dB
Bl/√RE
10
Pmax
1400 W