The MA7000 is of course the beefier unit and will probably put out more current when called for than the MA6900, but I would think the 6900 is plenty of grunt unless you're feeding power hungry speakers that take some crazy impedance dips. (several do despite their "tame" nominal readings-pays to look at the Frequency/Impedance graph for the speaker in question. I've heard the MA6900 and it is a really nice sounding unit driving fairly large full range speakers effortlessly. Haven't heard the 7000, but it may be more of a vanity purchase than a requirement.....but I've been wrong before!
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