I don't think that "high current" describes an attribute or a particular amperage threshold that is to be surpassed. Look at it this way: a 50 wpc that can double down from 8 ohms to 4 ohms will put out much less current than a 500 wpc amp that can also double down. Can they each be a "high current" amp? Maybe I'm wrong, but I think the term is a marketing one.
