Bill, > I'm thinking, that in my situation, building two finals would be the best > way to go. One, a small high-efficiency switching amp located out in the > woods, just like I have now, but with TO-220 transistors (maybe > MJE15028/30?) mounted to a plate for heat sinking. Why handicap yourself by putting an amp out in the woods? Wouldn't life be simpler to keep the active stuff inside? John A.