Aura 4600RPM 4"x6" 2-way Coaxial Speaker Pair Patented NRT neo magnet structure for high Xmax, extended bass, low distortion, and high power handling Polypropylene cone ensures durability, weather resistance, and low distortion Rubber surround for deep bass and long life 3/4&quot; soft dome tweeter for extended and smooth high frequency response High-grade steel frame prevents flexing and provides universal mounting