BOSS Audio Systems MRWT40 4 Inch Marine Waketower Stereo Speakers - 400 Watts Max, 2 Way, Full Range Audio, Tweeters, Coaxial, Weatherproof, Sold in Pairs - Walmart.com
Pyle 4 in. 100-Watt Low-Profile Waterproof Marine Speakers PLMRS4B - The Home Depot