Alex, the answer to that question depends on whether you're playing your system at a loudness level that exceeds the capacity of your 2200 and you're getting distortion in a noticeable amount. If not, adding a more powerful amplifier won't be of benefit. There's no magic in a separate amplifier or an amplifier with a higher maximum output capacity if it isn't needed. Unused headroom is simply that: unused.

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Enjoy the music, not the equipment.