Eighteen Sound 8NCX900

Name: 8NCX900
Brand: Eighteen Sound

Coaxial

8″ / 210 mm

Nominal diameter

130 Hz

Resonance

0.26

Q factor

97 dB

Sensitivity

± 3.2 mm

Linear excursion

600 W

Program Power

Sensitivity (1W, 1m, infinite baffle)
SPL_1W: 97.1; dB
Frequency response: 100 - 23000; Hz
Resonance frequency (free air)
f_S: 130; Hz
Mechanical quality factor
Q_MS: 8.00
Electrical quality factor
Q_ES: 0.27
Total quality factor
Q_TS: 0.26
Maximum linear excursion
x_max: 3.2; mm
Maximum excursion before damage
x_lim: 7.5; mm
Air volume displaced at x_max
V_D: 74; cm³
Power handling
P: 300; W
Program power
P_max: 600; W
Nominal impedance
Z: 8; Ω
DC resistance
R_E: 4.9; Ω
Inductance (1kHz)
L_E: 0.6; mH
VC Diameter: 75; mm
Winding material: Copper Clad Aluminum
Force factor
Bl: 19.0; N/A
Motor constant
Bl/√R_E: 8.58; N/√W
Material: Neodymium
Effective diameter: 171; mm
Effective area
S_D: 230; cm²
Moving mass
M_MS: 25; g
Moving mass (without air load)
M_MD: 22.3; g
Material: Straight
Stiffness
K_MS: 18.87; N/mm
Compliance
C_MS: 53; µm/N
Equivalent volume to the compliance
V_AS: 4; L
Mechanical resistance
R_MS: 2.55; N·s/m
Surround material: Triple roll, Polycotton
Nominal diameter: 8; ″
: 210; mm
Overall diameter: 225; mm
Baffle cutout diameter: 184; mm
Overall depth: 127; mm
Flange thickness: 11; mm
Mounting depth: 116; mm
Volume occupied by the driver (estimated): 1.7; L
Net weight: 4.5; kg

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Eighteen Sound 8NCX900

Coaxial

Thiele & Small parameters

Large signal parameters

Voice Coil

Magnet

Diaphragm

Suspensions

Dimensions

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