i was pretty woried about the 80's being 4 ohm myself. But i have a denon 3805. Which i think in only 120watts. Since i have gotten my 80's my reciever has had no problems. Have to actually turn it down way more than what i was running with the 8ohm speakers. Used to listen to regular tv at like -27 now i am up around -37 or so depending on the show. And when listing to dolby digital used to get down around -13 or so. NOw would blow my ear drumbs out if i got into the teens. It was different but never had any problems. I am sure your yamaha will probably do the trick.
