The Hertz DCX 690.3 is a 6×9 3-way coaxial car speaker designed to reproduce a wide frequency spectrum with coherent midrange and high-frequency detail. It uses a dedicated 60 mm midrange and a PEI dome tweeter integrated in a coaxial layout for compact installation.

Build features include an oversized magnetic motor for improved linearity, a TPU surround for controlled cone motion and durability, and a coaxial mounting format that fits standard 6×9 factory openings; verify mounting depth and hole pattern before installation.