Oberton 6NM150
Mid-range
6.5″ / 170 mm
Nominal diameter
124 Hz
Resonance
0.38
Q factor
95 dB
Sensitivity
± 2.25 mm
Linear excursion
300 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.7
dB
Frequency response
200 - 5000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
124
Hz
Mechanical quality factor
QMS
5.96
Electrical quality factor
QES
0.40
Total quality factor
QTS
0.38
Large signal parameters
Maximum linear excursion
xmax
2.25
mm
Air volume displaced at xmax
VD
31
cm³
Power handling
P
150
W
Program power
Pmax
300
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.3
Ω
Inductance (1kHz)
LE
0.3
mH
VC Diameter
44
mm
Winding height
HVC
8
mm
Winding material
Aluminium
Former material
Kapton
Magnet
Flux density
B
1.42
T
Force factor
Bl
11.58
N/A
Motor constant
Bl/√RE
4.63
N/√W
Air gap height
HAG
7
mm
Material
Neodymium
Diaphragm
Effective diameter
133
mm
Effective area
SD
139
cm²
Moving mass
MMS
11.1
g
Moving mass (without air load)
MMD
9.8
g
Material
Paper
Suspensions
Stiffness
KMS
6.76
N/mm
Compliance
CMS
148
µm/N
Equivalent volume to the compliance
VAS
4
L
Mechanical resistance
RMS
1.45
N·s/m
Dimensions
Nominal diameter
6.5
″
170
mm
Overall diameter
185
mm
Baffle cutout diameter
145
mm
Overall depth
72
mm
Volume occupied by the driver (estimated)
0.4
L
Net weight
1.05
kg
Frame material
Die cast aluminium
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6.5″Mid Bass
fS
110 Hz
SD
130 cm²
200 - 7000 Hz
QTS
0.33
xmax
3.0 mm
SPL1W
96 dB
Bl/√RE
3.91
Pmax
260 W
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6.5″Low frequency
fS
133 Hz
SD
154 cm²
150 - 7000 Hz
QTS
0.44
xmax
4.0 mm
SPL1W
94 dB
Bl/√RE
4.39
Pmax
300 W