Infinity Kappa 603CF

The Infinity Kappa 603CF is a premium 6-1/2" (165mm) two-way component speaker system designed for audiophiles seeking exceptional clarity and punchy mid-bass. Part of the renowned Kappa series, these speakers utilize High-Resolution Silk Dome Tweeters and Patented Plus One™ Glass Fiber Woofers to deliver a wide frequency response and high sensitivity, making them a significant upgrade over factory systems.

High-Resolution Audio Performance

The 603CF features 3/4" edge-driven silk dome tweeters capable of reaching frequencies up to 40,000 Hz. This Hi-Res certification ensures that you hear every nuance in your music, from delicate cymbals to clear vocals, with minimal distortion even at higher volumes.

Plus One™ Glass Fiber Woofers

Infinity's patented Plus One™ technology extends the cone area to the edge of the basket, providing more surface area than competing speakers of the same size. The glass fiber material is both lightweight and stiff, resulting in deeper, more robust bass and increased efficiency without requiring excessive power.

3-Way Upgradability

One of the standout features of the Kappa 603CF is its modular design. The included external crossovers feature a selection switch that allows you to easily add a 2" or 3" Kappa midrange speaker (like the Kappa 303S later, transforming your setup into a full 3-way component system with perfect tonal balance.

Flexible Tuning and Installation

The system includes slim crossovers that are easy to tuck away. A push-button control on the crossover allows you to adjust the tweeter output by 0dB or -3dB, helping you tailor the high-frequency response to your vehicle's specific acoustics and your personal listening preference.