5.25" Coaxial Speakers - 4 ohm Powersports Coaxial Speaker is built to sound great on the road or the trail even through a helmet, Tough construction that stands up to the elements is combined with high- grade sound quality, without modifications or adding extra weight. Add a PXA amplifier for a complete system, meant for the road and trail, These PS speakers work with 50 watts of power. See below for more details