Infinity Kappa 63.7i 6-1/2" 3-way car speakers For 6-1/2" and 6-3/4" openings 3-way car speakers for 6-1/2" and 6-3/4" locations (pair) Plus One woven-glass-fiber woofer cone with rubber surround EMIT tweeter and M.M.D. midrange computer-optimized outboard crossovers with tweeter level control power range: 2-75 watts RMS (225 watts peak power)