SoundTube SM590i-II 5.25-Inch Surface Mount Speaker | Model: SM590i-II-WX-WHModels with WX are weatherized for outdoor use The SM590I II speaker includes a higher power output for long throw and high SPL requirements as well as one 5. 25" polypropylene woofer and a 1", tractrix horn loaded, convex aluminum dome tweeter in a ported enclosure. SM590I II WX has a 87. 0 dB average sensitivity which offers high output capabilities and reduced amplification costs. The speaker has an easy access, six position selectable tap switch