The SM500I-II utilizes the patented ZeroReflection™ enclosure technology for optimal sound reproduction and cabinet rigidity as well as BroadBeam® waveguide technology to deliver a consistent dispersion pattern up to 10kHz for maximum coverage area per speaker. The SM500I-II has one 5.25inch (133mm) polypropylene woofer and one 1.0inch (25mm) convex titanium tweeter with FerroFluid™ cooling. The speakers 86.0 dB average sensitivity offers high output capabilities and reduced amplification costs and the six-position selectable tap switch for 25-, 70.7- and 100volt applications provides easy access. The included mounting systemwith vertical and horizontal pivoting allow the SM500i-II to be aimed anywhere within the installation space and the low profile enclosure design keeps the speaker close to the wall. Safety cable with speaker mounting bolt, Euroblock connector, and wall mount bracket are included.