SoundTube SM590i-II 2-way Outdoor Surface Mount Speaker - 5.25" (White)The SM590i II speaker includes a higher power output for long throw and high SPL requirements as well as one 5. 25 inch polypropylene woofer and one 1. 0 inch, tractrix horn loaded, convex aluminum dome tweeter in a ported enclosure. SM590i II 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 for 25 , 70. 7 and 100 volt