Alpine Spr-50 5.25-Inch 2 Way Pair of Car Speakers 5-1/4" Type-R Coaxial 2-way Car Speakers New style grille offers full woofer protection along with a unique new design Multi-Layer hybrid fiber cone delivers a really strong bass response High Amplitude Multi Roll (HAMR) Santoprene rubber surround provides consistent, extended cone movement 1" Swiveling silk ring-dome tweeter produces smooth highs