Eighteen Sound 8CX650

Coaxial

8″ / 200 mm

Nominal diameter

65 Hz

Resonance

0.35

Q factor

93 dB

Sensitivity

± 6 mm

Linear excursion

400 W

Program Power

Eighteen Sound 8CX650 Coaxial

Sensitivity (1W, 1m, infinite baffle)
SPL_1W: 92.7; dB
Frequency response: 90 - 4700; Hz
Resonance frequency (free air)
f_S: 65.0; Hz
Mechanical quality factor
Q_MS: 6.40
Electrical quality factor
Q_ES: 0.37
Total quality factor
Q_TS: 0.35
Maximum linear excursion
x_max: 6.0; mm
Air volume displaced at x_max
V_D: 136; cm³
Power handling
P: 200; W
Program power
P_max: 400; W
Nominal impedance
Z: 8; Ω
DC resistance
R_E: 4.9; Ω
Inductance (1kHz)
L_E: 0.7; mH
VC Diameter: 65; mm
Winding material: Edgewound Aluminum
Force factor
Bl: 12.0; N/A
Motor constant
Bl/√R_E: 5.42; N/√W
Effective diameter: 170; mm
Effective area
S_D: 227; cm²
Moving mass
M_MS: 25.6; g
Moving mass (without air load)
M_MD: 23.1; g
Stiffness
K_MS: 4.27; N/mm
Compliance
C_MS: 234; µm/N
Equivalent volume to the compliance
V_AS: 16.6; L
Mechanical resistance
R_MS: 1.63; N·s/m
Nominal diameter: 8; ″
: 200; mm
Overall diameter: 210; mm
Baffle cutout diameter: 185; mm
Overall depth: 132; mm
Flange thickness: 8; mm
Mounting depth: 124; mm
Volume occupied by the driver (estimated): 1.9; L
Net weight: 5.6; kg

Eighteen Sound 8CX650 SPL

Eighteen Sound 8CX650 Dimensions

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