Meridian America 541 - Manual (Page 51)

Setting up sources
T
his chapter explains how to connect up sources to the 541 Surround
Controller, and set them up to your preferred configuration.
When you set up the surround controller to one of the standard settings,
the inputs are automatically configured to cater for the six most common
arrangements of sources and inputs.
Alternatively, you can configure each source individually to suit the other
equipment in your system. You can choose the label for each source, and
the input sensitivities so that the sound level remains similar when you
switch between sources.