Boston Acoustics SX55 - Car speaker - 50 Watt - 2-way - coaxial - 5.25 5-1/4" 2-way speakers (pair) copolymer woofer cone with butyl rubber surround Type-S2 Kortec dome tweeter compact neodymium magnets for shallower mounting depth power range: 2-50 watts RMS (140 watts peak power)