Oberton 12NCX

Coaxial

12″ / 315 mm
Nominal diameter
58 Hz
Resonance
0.3
Q factor
98 dB
Sensitivity
± 5.25 mm
Linear excursion
700 W
Program Power
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply
Sensitivity (1W, 1m, infinite baffle)
SPL1W
98.0
dB
Frequency response
60 - 16000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
58.2
Hz
Mechanical quality factor
QMS
6.18
Electrical quality factor
QES
0.31
Total quality factor
QTS
0.30

Large signal parameters

Maximum linear excursion
xmax
5.25
mm
Air volume displaced at xmax
VD
270
cm³
Power handling
P
350
W
Program power
Pmax
700
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.7
Ω
Inductance (1kHz)
LE
0.58
mH
VC Diameter
77
mm
Winding height
HVC
15
mm
Winding material
Aluminium
Former material
Kapton

Magnet

Flux density
B
1.1
T
Force factor
Bl
17.19
N/A
Motor constant
Bl/√RE
7.2
N/√W
Air gap height
HAG
9
mm
Material
Neodymium

Diaphragm

Effective diameter
256
mm
Effective area
SD
515
cm²
Moving mass
MMS
43.9
g
Moving mass (without air load)
MMD
35.5
g
Material
Paper with glassfiber

Suspensions

Stiffness
KMS
5.88
N/mm
Compliance
CMS
170
µm/N
Equivalent volume to the compliance
VAS
62.9
L
Mechanical resistance
RMS
2.6
N·s/m

Dimensions

Nominal diameter
12
315
mm
Overall diameter
315
mm
Baffle cutout diameter
280
mm
Overall depth
191
mm
Volume occupied by the driver (estimated)
3.0
L
Net weight
5.4
kg
Frame material
Die Cast Aluminium
Oberton 12NCX SPL
Oberton 12NCX Dimensions

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fS
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SD
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55 - 5000 Hz
QTS
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xmax
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SPL1W
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Bl/√RE
8.08
Pmax
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