Infinity Kappa 62.7i 6-1/2" 2-way car speakers For 6-1/2" and 6-3/4" openings 2-way car speakers for 6-1/2" and 6-3/4" locations (pair) 2-ohm impedance for extra power (compatible with all factory or aftermarket car stereos) Plus One woven-glass-fiber woofer cone with hi-roll rubber surround rotating UniPivot M.M.D. dome tweeter computer-optimized outboard crossover with tweeter level control