Eigtheen Sound 8CX650 8 " 1" Coaxial speaker 8ohm
The 8CX650 is a 8" - 1" coaxial transducer designed for use in compact reflex enclosures and stage monitors as small as 30 lt, with a nominal dispersion of 90 degrees.

91.0 dB LF/106 dB HF SPL 1W/1m average sensitivity
Single magnet motor
400W LF - 140W HF maximum program power handling
65 mm (2.5”) LF voice coil
44 mm (1.75”) HF PEN diaphragm
Proprietary Phase Plug design
HF copper sleeve for reduced distortion and higher output
90 degrees nominal conical dispersion
Atmos™ ready*
Extended LF design
Suitable for very compact enclosures and stage monitors

LF General Specifications

Nominal Diameter 200 mm (8 in)
Rated Impedance 8 Ohm
AES Power 400 W
Program Power 800 W
Peak Power 1600 W
Sensitivity 91 dB
Frequency Range 60 ÷ 4700 Hz
Power Compression @-10dB 0,7 dB
Power Compression @-3dB 1.8 dB
Max Recomm. Frequency 1800 Hz
Recomm. Enclosure Volume 15 - 35 lt. (0.53 - 1.24 cuft)
Minimum Impedance 5.8 Ohm at 25°C
Max Peak To Peak Excursion 26 mm (1 in)
Voice Coil Diameter 65 mm (2.56 in)
Voice Coil Winding Material Edgewound copper
Suspension Triple roll, Polycotton
Cone Straight, water repellent composite

Thiele Small Parameters

Fs 65 Hz
Re 5.1 Ohm
Sd 0,0227sq.mt. (39.19 sq.in.)
Qms 6.40
Qes 0,37
Qts 0,35
Vas 16.6 lt. (0.59 cuft)
Mms 25.6 gr. (0,06 lb)
BL 12 Tm
Linear Mathematical Xmax ± 6mm (±0,24 in)
Le 0.70 mH
Half space efficiency 1.2 %

HF General Specifications

D.C. Resistance 5.3 Ohm
Continuous Power 70W above 1,1 kHz
Max. program power 140W above 1,1 kHz
Sensitivity 106 dB
Frequency Range 900 - 15000 Hz
Min Xover Frequency 1.5 kHz
Diaphragm material Pen
Voice Coil winding material Edge-wound aluminum
Voice Coil Diameter 44mm

Overall diameter 210 mm (8.27 in)
N. of mounting holes and bolt 8
Mounting holes diameter 6.1 mm (0.24 in)
Bolt circle diameter 195 - 198 mm (7.68 - 7.80 in)
Front mount baffle cutout 185 mm (7.28 in)
Rear mount baffle cutout 185.5 mm (7.30 in)
Total depth 132 mm (5.20 in)
Flange and gasket thickness 8.8 mm (0.35 in)
Net weight 5,6 kg (12,34 lb)
Shipping weight 6 kg (13,22 lb)
CardBoard Packaging dimensions 230 x 230 x 150 mm

The 8CX650 is a 8" - 1" coaxial transducer designed for use in compact reflex enclosures and stage monitors as small as 30 lt, with a nominal dispersion of 90 degrees.
The high force ceramic single magnet structure makes the 8CX650 a lightweight speaker for its performance class - only 5,5 kg (12 lb).
The 65 mm (2.5 in) LF edgewound CCAW voice coil employs our Interleaved Sandwich Voice coil (ISV) technology, in which a high strength fiberglass former carries windings on both the outer and inner surfaces to achieve a balanced coil with a uniform distribution of mass and motion energy. This results in an extremely linear motor assembly.
The low-profile smooth straight LF cone provides a smooth response within its intended frequency range and maximum reliability under high mechanical stress. Equipped with a proprietary hybrid radial tangerine phase plug, the integrated HF compression driver has been designed to deliver a smooth coherent wavefront at the horn entrance in all working frequency ranges with a high level of manufacturing consistency. The phase plug, with its short openings and high flare rate value, assures low distortion and remarkable improvements in mid-high frequency reproduction. A copper sleeve reduces inductance value above 10kHz, improving phase and impedance linearization.
The HF diaphragm assembly is made by proprietary treated Polyethylene material. Thanks to its superior diaphragm dimensional stability, Polyethylene shows constant behavior during its whole working life. Moreover, this particular material with its very high value of elasticity modulus is capable of superior transient and intermodulation distortion response. The flat suspension shape is designed to maintain low stiffness and low mid-band distortion and response.
An edge-wound aluminum voice coil wound on proprietary treated Nomex completes the diaphragm assembly. Thanks to its physical properties, the proprietary treated Nomex former shows a 30% higher value of tensile elongation at a working operative temperature when compared to Kapton. This feature enables proper energy transfer control from the voice coil to the dome in real working conditions. Moreover, this proprietary former material is suitable for use in damp and wet environments. A specific dedicated HF driver throat design has also been chosen, maximizing the cone’s profile coupling.