Upgrade compatible factory speaker locations with a matched Infinity Kappa four-speaker package. This bundle includes two Kappa 63XF 6.5-inch (165 mm) 2-way car speakers and two Kappa 693M 6x9-inch (168 mm x 240 mm) 3-way car speakers, creating a coordinated solution for front-and-rear audio system upgrades. The Kappa 63XF speakers are designed for compatible 6.5-inch door, dash, or rear-deck locations. Their edge-driven silk dome tweeters use oversized voice coils to deliver smooth, extended high-frequency detail and response up to 40 kHz. Selectable 0 dB and -3 dB tweeter output settings help tailor brightness and tonal balance based on mounting position. Kappa 693M 6x9-inch speakers add the output and coverage of a larger cone area with a 3-way design. Like the 63XF pair, they feature silk dome tweeters and selectable tweeter-level adjustment for a more customized listening presentation. Both speaker pairs use lightweight, rigid glass fiber woofer cones engineered for responsive performance, efficient output, and enhanced low-frequency presence. The result is detailed vocals, clear high frequencies, and confident musical impact for compatible car, truck, SUV, and custom mobile-audio installations. Verify vehicle mounting depth, cutout dimensions, and wiring requirements before installation.