Drew, listening impressions not resulting from controlled double blind sessions with all variables held constant shouldn't be used as if they were established fact. The numbers in your post aren't realistic for listening to M80s at a typical distance in a typical listening room. For a 105dB peak level something on the order of 50-100 watts would be used. Also note than a 6dB difference per doubling of listening distance can't be accurately applied in a live room rather than an anechoic chamber. The difference would be far less, depending on room characteristics, but 3dB rather than 6dB would be closer as an estimate.
