first off welcome to head-fi.
secondly, this is the "Dedicated Source Component" sub-thread/board, where people discuss "source components" ...i.e. soundcards, digital-to-analog converters, vinyl players, etc.
What you're referring to is the amplification process, and in that regard you should post your questions in the "Headphone Amps" board as the Mapletree amp you're referring to is indeed a dedicated headphone amp.
and lastly, to answer your...