SoundTube Outdoor XT550 Speaker System in Green The SoundTube XT550 is a premium 2-way outdoor loudspeaker solution for installations requiring high-performance sound in a durable speaker design. Not only is it UV resistant, scratch resiatant, chlorine resistant, and weather resistant with professional-grade components for long-lasting performance and durability, the XT550 is designed for full-range back-ground and foreground music as well as paging. The speakers sealed, in-ground enclosure design delivers true low end response (38 Hz, 10 dB) and optimal off axis performance. The XT550 includes theft resistant mounting hardware and a weatherproof 5-position tap switch for 25/70.7/100 Volt applications with transformer bypass position. IP-Rating: IP55.