Did a quick Google and found this article. From the discussion in sec.10.4.2 and fig. 10.4.1 it appears that in the living room that was analyzed there would only be about a 3dB falloff from the 1 meter standard measuring distance to 3 meters and very little from 3 to 5 meters. Maybe not as much power is needed in typical rooms as is sometimes said, using the -6dB for doubling of distance measure.

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Enjoy the music, not the equipment.