There are more efficient drivers available, if that matters. As Romy pointed out, usually very different systems are used in PA and in homes. I thought you were talking about a Front Loaded Horn, not a Compound horn. "using the acoustic energy from both the front and rear of the driver in a horn loaded fashion." as you put it.
Yes, they have been built, e.g. Tannoy's Westminster & Autograph, Lowther's TP1, etc. Sound is a matter of opinion, and taste... I've experimented with them, very difficult to implement, and to balance the front and rear wave, much time-align... I felt it was a dead end, and is why I'm now building a five-way FLH system. YMMV, good luck! Robert |