One thing I did find that improved the sound of my MC200 was a power conditioner. I found a rather inexpensive one from Array Solutions that works well (about $100 CDN). Meridian admitted they are looking at incorporating power conditioning in their equipment moving forward. I believe the science behind this is not only to keep power line noise from entering the MC200 but also to keep the noise from the MC200 from entering the power line and impacting other union components.

Roon, MS600, Simaudio 780D, Simaudio P-8/W-8 and Revel Studio 2s