Alex, welcome. As with all speakers which don't have a built-in amplifier, the M80s require an external amplifier for power. As Mojo pointed out, the amp in your 2200 should be plenty in nearly all circumstances. Some of its features are a bit dated, but that's another matter.
All speakers "come alive" more at higher volume levels and there's nothing different about the M80s in that respect. Certainly they can be enjoyed at moderate volume levels, although they're capable of reaching very high levels with relatively low distortion. There's no rule that the bigger the speaker, the louder you have to play it.
