The Pioneer TS-A1374R 5-1/4 In. 3-Way Speakers feature 5-1/4 inch woofers with carbon graphite IMPP cones with interlaced Aramid fiber that ensure clarity in your music's bass and percussion. Highly elastic polymer surrounds help keep cone movement under control, for smooth, tight bass. The 1-5/8 inch cones fill in all the midrange details for lush vocals and crisp instruments. Soft dome tweeters deliver warm, dimensional treble, so you will hear all the overtones that give your music ambiance. The built-in crossovers ensure that the right frequencies go to the tweeter, midrange, and woofer, so your music sounds natural, just as the artist intended.