Oberton 8NM200

Mid-range

8″ / 210 mm
Nominal diameter
84 Hz
Resonance
0.2
Q factor
97 dB
Sensitivity
± 2.75 mm
Linear excursion
400 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
97.4
dB
Frequency response
100 - 4000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
83.9
Hz
Mechanical quality factor
QMS
11.30
Electrical quality factor
QES
0.21
Total quality factor
QTS
0.20

Large signal parameters

Maximum linear excursion
xmax
2.75
mm
Air volume displaced at xmax
VD
56
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
0.37
mH
VC Diameter
51
mm
Winding height
HVC
10
mm
Winding material
Aluminium
Former material
Kapton

Magnet

Flux density
B
1.55
T
Force factor
Bl
14.88
N/A
Motor constant
Bl/√RE
6.49
N/√W
Air gap height
HAG
9
mm
Material
Neodymium

Diaphragm

Effective diameter
160
mm
Effective area
SD
202
cm²
Moving mass
MMS
16.6
g
Moving mass (without air load)
MMD
14.3
g
Material
Paper with glassfiber

Suspensions

Stiffness
KMS
4.61
N/mm
Compliance
CMS
217
µm/N
Equivalent volume to the compliance
VAS
12.1
L
Mechanical resistance
RMS
0.77
N·s/m

Dimensions

Nominal diameter
8
210
mm
Overall diameter
225
mm
Baffle cutout diameter
187
mm
Overall depth
82
mm
Volume occupied by the driver (estimated)
0.74
L
Net weight
2.0
kg
Frame material
Die cast aluminium
Oberton 8NM200 SPL
Oberton 8NM200 Dimensions

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