No, Mark, it doesn't work that way. Speakers of typical sensitivity, including the Axioms, are about 1% efficient or a bit less in converting electrical power input into acoustical power output. In the 75 watt maximum power example that you mention, the speaker would put out 0.75 acoustic watt or less when fed the maximum 75 watts on a brief peak. An acoustic watt equates to a sound level of about 112dB at the standard 1 meter measuring distance, and 0.75 watt would be about 110-111dB, an unbearably loud level except for a momentary peak.
At a comfortably loud average listening level these speakers use about 1 watt of power input. Brief peaks would take much more, of course, and whether more than 75 watts would be needed for those peaks would depend on how loud of an average listening level is used and how wide the dynamic range of the material being played is. For the vast majority of home uses typical receivers with ratings in the 75-140 watt area should be fine(there's less than a 3dB difference in maximum output between those two numbers).
