Yeah, you are making sense - and while I doubt it would be likely if the speaker were behaving normally (my understanding has always been that speakers rated at 4 ohms will actually vary from around 4 ohms down to perhaps 2.5 ohms or lower), it is possible that the speakers in question dipped lower than normal for some reason and produced the behavior. I guess my thought was that if it were a common behavior for Axioms there would have been other instances (too many Axioms around being driven by Outlaw amps, not to mention other nominal 4 ohm speakers like Polk LSi, Jed M's Onix's, and others) and if it were a defect in the amp it would have been turned up when tested by Outlaw. I suspect we'll never know exactly what the problem was in this case...