I know that Sony seems to have a bad rep for handing the 80s, but I did run four 80s, VP150, and a pair of the QS8s, on the old Sony DE935. It handled it without problems till I changed out to seperates, but this was not as a very high sound level, nothing like I'm running with the Halos of course.
The DA5ES shows 110 watts at 8ohm, so at normal levels it should hadle a pair of 80s and your other Axioms. As Randy mentioned, leave the setting on the Sony at the 8ohms, check the speaker wire connections, especially on the Sony unit for any wire that maybe in contact with the chasis.
You should be able to power the Axioms even with the Sony.
