Mark,
I don't know about the MX700, but my MX900 got an update that could toggle between DynVol+DynEQ ON, DynVol Only ON, Dyn Only On, Dyn Vol and DynEQ OFF. I believe it was called "suuround <sic> parameter" in the new URC DB update.

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Denon 4520, EPIC80/500/VP180 Speakers