Infinity Primus 603F 6.5" Coaxial Speakers

Infinity Primus 603F 6.5" 2-way coaxial car speakers deliver smooth vocals, crisp cymbals, and rich bass in a compact package built to fit a wide range of vehicles. Featuring Infinity's cooling vented basket frame, they maintain output with less wear over time.

• 6-1/2" 2-way coaxial design: Integrates woofer and tweeter in a single unit for a compact upgrade that fits many factory openings and aftermarket installations.
• Plus One+ polypropylene woofer cone with hi-roll rubber surround: Increases cone surface for stronger bass response and extended excursion while preserving durability and control.
• 1/2" edge-driven silk dome tweeter: Delivers clean high-frequency detail with low distortion at high listening levels.
• 3-ohm impedance: Lower impedance helps draw more current from your head unit or amplifier and is compatible with virtually all factory or aftermarket car stereos.
• Power handling: 50W RMS / 150W peak: Indicates safe continuous power and dynamic headroom for typical head units or amps.
• Frequency response: 55 Hz – 20 kHz: Covers deep bass to sparkling highs for a full-range listening window.
• Sensitivity: 92 dB @ 2.83V: How efficiently the speaker converts power to audible sound, influencing perceived loudness with given input.
• Cooling vented basket frame: Aims to maximize sustained output and reduce wear during extended playback.
• Infinity's true 4-ohm architecture: Uses a low-impedance voice coil to safely draw extra power from factory radios, aftermarket stereos, or an external amplifier for stronger, clearer sound.
• Grilles not included: Ships without grilles, giving installation flexibility in various vehicle interiors.
• Warranty: 1-year warranty.
• What's in the box: Infinity Primus 603F owner's manual; Two 2-way speakers; Two 8" lengths of speaker wire (each with female quick-slides on one end and tinned wire on the other); Eight 1" screws; 8 speed clips; 2 adhesive-backed foam gaskets; Template and specs on box.

In a typical car audio build, the Primus 603F upgrades from factory speakers to deliver clearer vocal articulation, more defined high end, and stronger bass without occupying excessive space. The Plus One+ woofer and edge-driven tweeter work together for a coherent soundstage, while the 3-ohm impedance and true 4-ohm architecture support efficient power delivery from a range of source units, including amplifiers for additional headroom. The cooling basket frame helps maintain performance during longer sessions, contributing to reliable real-world usability and longevity.