I built a pair of tweeter boxes to put the little horn tweeters into because my sound system for the music room was lacking in high frequency response. The tweeters came from some old home made P.A. speakers that I had made many years ago when I was in a band. They're a bit more harsh than I would like, but they do fill in the high frequencies. I'm planning on replacing them with dome tweeters at some point, I don't need the horn projection for the room they're in.