Here is a link to the owners manual off of the McIntosh website. I find that reading the owners manual answers a lot of questions. This is a nice peice and I almost purchased one because of the way it would intergrate with my MX135 but went another direction.
http://www.mcintoshlabs.com/downloads/product_manuals/c2300om01.pdf
http://www.mcintoshlabs.com/downloads/product_manuals/c2300om01.pdf