These Kicker PS5250 5.25" Weather-Resistant Coaxials are engineered with bike riders and powersports enthusiasts in mind. The weather-resistant design makes them ideal for any weather, making them ideal for motorcycles and UTV's. The PS 5-1/4-Inch 2 Ohm Powersports Coaxial Speaker is built to sound great on the road or the trail, even through a helmet. Kicker PS Coaxials have a lightweight design featuring titanium tweeters and neodymium magnets. These PS speakers work best with 50 watts of recommended power.