Hertz CX 165 6.5" Two-Way Coaxial Speakers

The Hertz CX 165 is a pair of 6.5-inch two-way coaxial car speakers designed for factory-location audio upgrades. Its integrated tweeter layout provides a practical replacement option where separate tweeter mounting is not desired. The 4-ohm design is suited to systems built around compatible car audio amplification or speaker outputs.

These speakers are intended for listeners seeking a fuller and more detailed presentation from a standard 6.5-inch mounting location. The coaxial format combines the woofer and tweeter in each speaker, simplifying installation compared with a separate-component system. They can be used in front or rear locations when vehicle fitment and mounting clearance are verified.

The CX 165 is rated for 70 watts continuous power handling and 210 watts peak power handling. Its specified frequency response extends from 55 Hz to 22 kHz, while the 93 dB SPL sensitivity specification supports efficient output. A 165 mm semi-pressed paper-mica woofer cone is engineered to balance low moving mass with damping.

For high-frequency reproduction, Hertz uses a 24 mm Tetolon dome tweeter with a neodymium magnet. The RHFC rotary high-frequency contour design allows the tweeter to be angled and directed toward the listener. Hertz also specifies a faceplate geometry developed for more linear off-axis response.

The woofer uses a 25 mm voice coil on an aluminum former and a high-density ferrite magnet assembly. Its compact three-spoke basket and rubber magnet cover are designed to help control unwanted vibration. As a pair, the CX 165 can serve as a direct coaxial upgrade or complement a larger Hertz-based vehicle audio system.

Key Features

• Two-Way Coaxial Design: Integrates woofer and tweeter in each speaker for a compact upgrade format.
• 70W Continuous Power: Supports systems with up to 70 watts RMS per speaker.
• 24 mm Tetolon Tweeter: Provides high-frequency reproduction with a soft Tetolon dome.
• RHFC Tweeter Adjustment: Allows the tweeter to be angled toward the listening area.
• SPP-M Woofer Cone: Semi-pressed paper and mica construction balances lightness and damping.
• Ferrite Woofer Magnet: Uses a high-density ferrite motor with low-carbon polar plates.

Design & Installation

The CX 165 combines a semi-pressed paper-mica woofer cone, Tetolon dome tweeter, high-density ferrite woofer magnet, and neodymium tweeter magnet. Its woofer has a 25 mm aluminum-former voice coil, while the tweeter assembly is ferrofluid cooled. The three-spoke basket includes a rubber magnet cover, and the optional CG 165 grille uses an ABS structure with protective metal mesh.

Confirm the vehicle's speaker opening, mounting depth, and mounting-hole pattern before purchase. Hertz lists a 165 mm overall diameter, 142 mm dimension B, and 71 mm dimension C for the CX 165; installation adapters or brackets may be required depending on the vehicle. Wire each 4-ohm speaker with correct polarity and use an amplifier or source unit compatible with its impedance and power requirements.