The RBH HS615 Commercial Hanging Speaker is totally self enclosed and designed to be hung from the ceiling. The HS615 features a very narrow sound dispersion so it works perfectly in display situations where you want the sound directly below the speaker. If you're looking to get a little more audio coverage with the HS615, simply raise it higher.
The built in 70V transformer makes it possible to connect to either an 8 ohm or a 70V audio system. And the audio receives a little boost in quality with a 6.5" PolyGraphite cone and swivel tweeter.