The Hertz DCX 100.3 is a premium 4-inch 2-way coaxial speaker system from the Hertz Dieci Series, engineered to deliver detailed sound quality, high efficiency, and easy OEM replacement installation. Designed with a water-repellent pressed paper woofer cone, PEI dome tweeter, built-in crossover, and TPU surround, the DCX 100.3 produces crisp highs, natural vocals, and balanced midrange performance while remaining highly efficient on factory radio power. Its compact shallow-mount design makes it ideal for vehicles with limited speaker space while still delivering the signature Hertz sound performance. Features & Highlights 4-inch 2-way coaxial speaker system Hertz Dieci Series design Water-repellent pressed paper woofer cone PEI dome tweeter for crisp high frequencies Built-in crossover network TPU (thermoplastic polyurethane) surround Neodymium tweeter magnet assembly High-efficiency design performs well on factory radio power Compact shallow-mount depth for easier installation Excellent off-axis response and sound staging Designed for OEM replacement applications Sold as a pair Specifications Specification Details Speaker Size 4" (100mm) Speaker Type 2-Way Coaxial RMS Power Handling 30 Watts Peak Power Handling 60 Watts Impedance 4 Ohms Sensitivity 92 dB Frequency Response 70Hz – 21kHz Tweeter Type PEI Dome Woofer Cone Material Water-Repellent Pressed Paper Surround Material TPU Woofer Magnet High Density Flux Ferrite Tweeter Magnet Neodymium Mounting Depth 2.0" Cutout Diameter 3.7" Voice Coil Diameter 1" (25mm)