For your MC200 zone you don't need a processor. You can use the analogue output set to variable, and just add a power amp and speakers - or a pair of analogue active speakers (older Meridian ones from M3100 backwards, or from another manufacturer).

I have an MS200 used like this in my kitchen, with a pair of Genelec analogue actives.

Note that in this scenario you can control the volume of the MC200's variable analogue output with the iPad app.

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