Kg, welcome. The 807 should be excellent with your Axioms and would have at least the advantage over the Yamahas of Audyssey MultEQ auto-calibration and room correction.

The available maximum power should be plenty for all Axiom models at a typical listening distance(no, a room doesn't have to be "filled" with sound at the level needed at the listening position)for safe sound levels. Enjoy.

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Enjoy the music, not the equipment.