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Hertz Cento CX 690 - 3 Way Coaxial Speaker System


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The Hertz Cento CX 690 Coaxial Speakers featuring a 6×9 in. cone was designed to achieve maximum performance in horizontal installations and offering, even in this difficult setting, an exceptional tone, balance and power handling.


  • 6x9 in. semi-pressed paper elliptical cone SPP-M (Semi Pressed Paper-Mica) enhanced with Mica powder for an excellent balance between lightness and damping.
  • Wide rubber suspension engineered for a long excursion and excellent sound damping.
  • High-density flux ferrite magnet combined with low-carbon polar plates for reduced distortion at high power levels.
  • Basket with metallic finish acoustically combined with a rubber magnet cover for total damping of spurious vibrations.
  • 40 mm (1.58 in.) dome tweeter for efficient distortion-free mid-high frequency reproduction.
  • 20 mm (0.8 in.) dome supertweeter to maximize the level of very high frequencies in horizontal installations.
  • Tweeter faceplate geometry optimized with FEM simulations (Finite Element Modeling), to provide an extremely linear frequency response in off-axis installations.
  • Provided elegant grille made with high-resistance ABS plastic structure with a metallic finish combined with a protective metal mesh.

Technical Specifications



Tweeter diaphragm

Supertweeter diaphragm


mm (in)

mm (in)

mm (in)


6 x 9

40 (1.58)

20 (0.8)

Voice Coil Ø:





mm (in.)

mm (in.)

mm (in.)


30 (1.2)

28 (1.1)

20 (0.8)

Power Handling

W peak

W continuous



Impedance Ω 4
Frequence Response Hz 40 ÷ 23k
Woofer Magnet size



100 x 32 x 15

(3.94 x 1.26 x 0.59)

Tweeter Magnet size



19 x 3

(0.75 x 0.12)

Weight of one speaker kg (lb.) 1.55 (3.42)
Woofer Magnet High density flux ferrite
Tweeter Magnet Neodymium
Cone Semi-pressed paper + Mica
Dome PEI
Xmech mm (in.) 5.5 (0.22)

Further Information

Hertz Cento CX 690 - 3 Way Coaxial Elliptical Speaker System - Tech Sheet

Hertz Cento Speakers - User Manuals

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