I find it hard to believe the Mark Levinson would need the standard setting since that monster should have oodles of available current. My suggestion is to experiment with both and see which setting you prefer. Remember, once the math is done, you have to listen to it. So, what you prefer is far more important than what the manual states.
Plan B is to call the manufacturer and ask them as well as get more information on the switch settings. If you do this, post here what they say.
Plan B is to call the manufacturer and ask them as well as get more information on the switch settings. If you do this, post here what they say.