Thanks Wayne, that is the type horn I've been looking for. I have Jensen Imperial cabinets with EV Sp-15 woofs that can go way beyond 300hz, and Heil AMT tweeters that can't cross any lower than 2.5khz. I am thinking that your midhorn would fit nicely into those two. Do they make the Delta 10 in a 16ohm version? I will run them with a 300B tube amp. Cheers.