The Spa25 is an Engineered Outdoor Speaker Product with All-Environment Construction Designed to Meet Today's Most Stringent Conditions. The Spa25 Spa Speaker is a Specifically Designed Speaker for OEM and Replacement Spa Speaker Installations. The Spa25 is Perfect for OEM and Custom RV Speaker Applications. The Spa25 Construction Meets Marine Speaker Performance Standards. As a Weatherproof Speaker, the Spa25 Will Provide Years of Performance. The Spa25 is Tested to Survive Heat and Humid Environment as a Sauna Speaker. The Spa25 is Designed to Offer Sound Performance of Larger 3" and 3.5" Speaker Products While Providing All-Environment Outdoor Construction Lacking in Many Mobile and Marine Speaker Products.