So best sound to date with my Axiom M80s =

Two subwoofers crossed over at about 50 Hz.
Emotiva XPA-1L mono amplifiers (but run in class A/B)
Oppo BDP-105 DAC used with DNLA streaming over ethernet

THIS setup makes the M80s sit up & sing! It also adds what sounds like an extra octave of very, very low bass to the presentation without thickening the crossover frequency or the octave above.

I heard a rig yesterday that cost 3x what mine did, and mine sounded better! The M80s are just flat out amazing speakers!

My opinion is worth exactly what you're paying for it!