The importance of horn feedback (how much you hear behind the bell) has become increasingly obvious to me. This has resulted from extensive playing in a heavily sound proofed studio. The room is so dead, in fact, that sound is immediately absorbed. As a result, playing in this room requires much more effort than normal. In experimenting to see what could be done to make the experience more pleasant, I started playing through a system with a digital sound processor and headphones for better feedback. With this setup, a little reverb can be added back in to make the sound less "dry" and obviously, the feedback is greatly increased. The surprise has to do with just how much less effort is required to play. Technically, I suppose this is related to sound reinforcement of the pressure waves being produced in the horn. The other thing I believe this illustrates is the importance of a horns ability to provide feedback to the player. Much attention has been given to the projection quality of a horn but this points out the much overlooked feedback quality, at least, this appears to be the case for me. Just an interesting observation...Ken B.