Oberton 6NMB200
Mid-range
6.5″ / 170 mm
Nominal diameter
91 Hz
Resonance
0.24
Q factor
95 dB
Sensitivity
± 4.5 mm
Linear excursion
400 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
95.1
dB
Frequency response
200 - 5000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
91.5
Hz
Mechanical quality factor
QMS
10.18
Electrical quality factor
QES
0.24
Total quality factor
QTS
0.24
Large signal parameters
Maximum linear excursion
xmax
4.5
mm
Air volume displaced at xmax
VD
63
cm³
Power handling
P
200
W
Program power
Pmax
400
W
Voice Coil
Nominal impedance
Z
16
Ω
DC resistance
RE
10.6
Ω
Inductance (1kHz)
LE
0.18
mH
VC Diameter
51
mm
Winding height
HVC
12.5
mm
Winding material
Aluminium
Former material
Glass fiber
Magnet
Flux density
B
1.65
T
Force factor
Bl
18.83
N/A
Motor constant
Bl/√RE
5.78
N/√W
Air gap height
HAG
7
mm
Material
Neodymium
Diaphragm
Effective diameter
133
mm
Effective area
SD
139
cm²
Moving mass
MMS
14.2
g
Moving mass (without air load)
MMD
12.9
g
Material
Paper with glassfiber
Suspensions
Stiffness
KMS
4.67
N/mm
Compliance
CMS
214
µm/N
Equivalent volume to the compliance
VAS
4.94
L
Mechanical resistance
RMS
0.8
N·s/m
Dimensions
Nominal diameter
6.5
″
170
mm
Overall diameter
185
mm
Baffle cutout diameter
145
mm
Overall depth
83
mm
Volume occupied by the driver (estimated)
0.58
L
Net weight
1.64
kg
Frame material
Die cast aluminium
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fS
100 Hz
SD
102 cm²
300 - 5000 Hz
QTS
0.27
xmax
3.1 mm
SPL1W
94 dB
Bl/√RE
4.47
Pmax
200 W
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fS
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SD
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fS
82 Hz
SD
106 cm²
80 - 22000 Hz
QTS
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xmax
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SPL1W
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Bl/√RE
4.36
Pmax
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