Although most Rx can do efficient 4 Ohm speakers, few companies list them as 4 Ohm capable, using that whole liability excuse (in much the same way they have the current limiter function of the 6 Ohm setting). Companies have to assume that everybody is gonna sue them when they do something stupid and wreck their gear. It's easier to just point at the documentation and say "We told them not to!".


M80s/VP160/QS8s/EP350; M22s; M3s.