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The question I have is that it appears to be for an 8ohm speaker? So, how do I interpret the results when considering my m80's?



The model is agnostic of speaker impedance. 1W of power into a speaker is 1W of power regardless of its impedance.
Getting back to your question about how much power you were pushing, I'd say you were around 100 to 120W. I'm saying this based on readings I've taken of my environment and I'm factoring in that your room is better treated than mine.