Hi Dave,

Your current set is:

Zone 1:
MC200 ---Digital---> 861v4 ---> Meridian DSP Speakers.

Adding an ID40 card would yield two independent Sooloos zones:

Zone 1:
861v4+ID40 --> DSP Speakers.

Zone 2:
MC200 ---Digital---> Meridian DSP Speakers.
OR
MC200 ---Variable Analogue---> Active Speakers.
OR
MC200 ---Variable Analogue---> Power AMP --> Analogue Speakers.

Notes:

Both the ID40 and MC200 need to be connected to your home network, so they can share the Core and Storage and be controlled (play lists, volume etc.) by iPad(s), Control:Web, etc.

As the audio quality of the ID40 card is higher than the MC200, then the audio quality from 861v4+ID40 combination will be higher compared to when it was fed by the MC200's digital output.

The MC200 would be relocated to the room (or close to it) where second Sooloos zone is to be used. It does not need to be insight, so could hidden in a cupboard etc.

Trust this helps.

Regards,
Carl

861v6+ID40, HD621, 8000.2, 7200HC, 7200.2, SKYQ Silver, PS3, PDP-LX6090, QNAP TS870-Pro (8*6TB), Roon, iPadAir2.
[In Reserve] C15, MD600 (2*3TB), TwinStore RM (2*2TB)