The "Input Delay" is a great feature in mixing to create "separation" or "width" in a mix. A mono signal can be split into 2 channels and linked as a stereo input. The key is to delay one of the inputs and whabam, you just need to try it for yourself. BUT, with the series 3 when stereo linking a pair of inputs, the "input delays" are locked together. Can these be separated much like the 48volt are? Or at least give the option to do so.