Oberton 8NMB250VCX

Name: 8NMB250VCX
Brand: Oberton

Coaxial

8″ / 210 mm

Nominal diameter

85 Hz

Resonance

0.16

Q factor

99 dB

Sensitivity

± 4.25 mm

Linear excursion

500 W

Program Power

Sensitivity (1W, 1m, infinite baffle)
SPL_1W: 99.0; dB
Frequency response: 85 - 20000; Hz
Resonance frequency (free air)
f_S: 85.2; Hz
Mechanical quality factor
Q_MS: 7.24
Electrical quality factor
Q_ES: 0.17
Total quality factor
Q_TS: 0.16
Maximum linear excursion
x_max: 4.25; mm
Air volume displaced at x_max
V_D: 86; cm³
Power handling
P: 250; W
Program power
P_max: 500; W
Nominal impedance
Z: 8; Ω
DC resistance
R_E: 5.4; Ω
Inductance (1kHz)
L_E: 0.07; mH
VC Diameter: 62; mm
Winding height
H_VC: 12; mm
Winding material: Aluminium
Former material: Glass fiber
Flux density
B: 1.55; T
Force factor
Bl: 17.76; N/A
Motor constant
Bl/√R_E: 7.64; N/√W
Air gap height
H_AG: 7; mm
Material: Neodymium
Effective diameter: 160; mm
Effective area
S_D: 202; cm²
Moving mass
M_MS: 18.3; g
Moving mass (without air load)
M_MD: 16; g
Material: Paper with carbon fibers
Stiffness
K_MS: 5.24; N/mm
Compliance
C_MS: 191; µm/N
Equivalent volume to the compliance
V_AS: 10.7; L
Mechanical resistance
R_MS: 1.35; N·s/m
Nominal diameter: 8; ″
: 210; mm
Overall diameter: 225; mm
Baffle cutout diameter: 187; mm
Overall depth: 162; mm
Volume occupied by the driver (estimated): 1.8; L
Net weight: 3.88; kg
Frame material: Die Cast Aluminium

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Oberton 8NMB250VCX

Coaxial

Thiele & Small parameters

Large signal parameters

Voice Coil

Magnet

Diaphragm

Suspensions

Dimensions

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