Hertz ECX165.5 Energy 6.5" Coaxial Speakers



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The Energy.5 ECX 165.5 car audio coaxial is the solution for those who want to reproduce a wide frequency range without the need of separate components: the coax tweeter adds to the woofer response optimizing the installation-friendliness.
Neodymium tweeter with built-in crossover, pressed-paper cone with deep ribbings for maximum rigidity and accurate optimization of the motor assembly contribute to enhance sound linearity, off-axis response and timbre quality. Thanks to the RHFC technology, the tweeter can be oriented, being 10° angled, to control dispersion and get close to the ideal frequency response.


Power Handling - Peak W: 210
Power Handling - Continuous W: 70
Impedance Ω: 4
Frequency response Hz: 60 ÷ 23k
Sensitivity dB SPL: 94
Woofer size mm: 165
Tweeter size mm: 24
Woofer Voice Coil Ø mm: 25
Tweeter voice coil Ø mm: 15
Woofer magnet: High density flux ferrite
Tweeter magnet: Neodymium
Woofer cone: Water-repellent pressed paper
Tweeter dome: PEI


1. Water-repellent treated paper cone, butyl rubber surround.

2. Pure copper voice coil wound on aluminium former, for very good thermal and mechanical capacity.

3. Large motor assembly for excellent mobile voice coil control.

4. Low carbon content plates for maximum magnetic permeability and high heat dissipation.

5. Rubber magnet cover provides damping to the basket and motor structure and protects from abrasions and damages.

6. DIN size basket coated with scratch-proof, corrosive-resistant material.

7. Tin-plated, high current terminals.

8. Silver-plated lead wires, for maximum reliability and conductivity.

9. Epoxy glue for basket and motor system provides perfect coupling.

10. Curve memory Nomex spider for consistent, reliable performance.

11. High energy neodymium magnet tweeter.

12. RHFC, Rotary High Frequency Contour; adjustable for perfect off-axis dispersion and frequency response, according to the listening position.


Rotary High Frequency Contour

The tweeter group is adjustable and can be oriented towards the listening point. This means no limits to the installation: with the RHFC system you can tune the response for any listening point. For perfect off-axis dispersion and frequency response.

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