Hertz C26 1" Cento Series Component Tweeters

The Hertz C26 is a pair of 1-inch component tweeters designed to add dedicated upper-frequency reproduction to a car audio system. They are intended for systems that need clearer high-frequency detail than a full-range door speaker alone can provide. With a 4-ohm nominal impedance, the C26 is suited to compatible component-speaker and amplified-system installations.

A 26 mm Tetolon dome and 20 mm voice coil form the acoustic core of the C26. This design is specified for detailed, natural reproduction through the mid-high and high-frequency range. Its published response extends from 1.8 kHz to 22.5 kHz, helping it cover the frequencies commonly assigned to a dedicated tweeter.

The C26 uses a neodymium magnet assembly, which allows a compact physical format for installation in factory-style locations or custom panels. Hertz specifies a 92 dB SPL sensitivity, supporting use with appropriately matched component systems. The tweeter is rated for 120 watts peak power when high-pass filtered at 2.5 kHz with a 12 dB-per-octave slope.

Its faceplate and dispersion design are engineered to support off-axis installations, an important consideration in dashboards, sail panels, and A-pillars where speakers may not point directly at the listener. The result is a practical option for installers seeking a compact tweeter with a controlled listening-area response. The 1-inch dome format also works well as part of a front-stage upgrade using separate woofers and a suitable crossover network.

The C26 is sold as a pair and is designed for component-system use rather than direct full-range operation. It can be installed in flush or wedge-mount configurations using the available mounting arrangements. For reliable operation, pair it with a properly selected high-pass crossover and amplification that are appropriate for its 4-ohm load and published power-handling condition.

Key Features

• 26 mm Tetolon Dome: Provides dedicated reproduction of mid-high and high frequencies.
• 20 mm Voice Coil: Supports the compact 1-inch tweeter design.
• Neodymium Magnet: Delivers magnetic strength in a small assembly.
• 92 dB SPL Sensitivity: Helps the tweeter work efficiently in matched systems.
• 1.8 kHz–22.5 kHz Response: Covers a broad published high-frequency operating range.
• Flexible Mounting Format: Supports flush and wedge-mount installation approaches.

Design & Installation

The C26 combines a Tetolon dome diaphragm with a neodymium magnet and compact 20 mm voice coil. Each tweeter has a 44 mm overall outside diameter, a 38.5 mm cutout requirement, and a 9.1 mm mounting depth. The compact dimensions can be useful when adapting factory tweeter locations or building custom panels.

Use the C26 as part of a properly crossed-over component system; Hertz specifies its 120-watt peak rating with a 2.5 kHz high-pass filter at 12 dB per octave. Confirm that the mounting location has clearance for its 20 mm overall height and 9.1 mm mounting depth. Flush mounting is appropriate for recessed locations, while wedge mounting can help aim the tweeter toward the listening area when placement allows.