CS-Series 4 x 6-inch Coaxial Speakers give you the quality you want, with the factory fit you need. The CS-Series design features near-zero tweeter protrusion, so your speakers fit perfectly behind factory grilles. This simple, drop-in solution delivers acclaimed KICKER performance with a stamped-steel framework, rigid polypropylene cone and EVC (Extended Voice Coil) technology. You get superb clarity, durability and volume - now and way down the road! These CS speakers work best with 50 watts of continuous power.