I drove 1.3 Ohms at what I consider to be loud in my 4,000 cubic foot room with my Denon 90W/channel amp. The load was M80s, M60s, M22s, Nuance and Bose.
One of these days I'm going to drive my Denon into a dead short to see if I can blow it up. That way I can justify a new pre-pro .