For your consideration, 2 Replacement drive in movie speakers 4" X  4" Waterproof Mylar Cone, 8 ohm, 6 watt typical to 10 watt max. NEW! This speaker fits MOST drive in theater or theatre speaker housings, but not all... Please see Mechanical Drawing and Specifications to make sure the speakers are a good fit for you.  Drive-In Mfg. Company