Lac, three further comments: your 2200 has a fixed 90Hz crossover(good enough)so there's nothing that you can set there; even the M80s should be set "small" to allow the sub to handle what it does best and take some of the load off the mains; you might try moving the sub even nearer, not farther, into the corner(just so it's not actually touching the walls), since the strongest bass reinforcement from the room occurs when the sub driver cone is just a few inches from the floor and walls.

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Enjoy the music, not the equipment.