I have some older ears, and generally feel I need to compensate for issues, including older vinyl (dull mids and highs) and recording issues of some first generation Cd recordings (too bright). So, in order to deal with real world issues such as these, I have the option of system bi-pass from my balanced throughout to a Schiit Lokuis tone control. The tone control is the best answer for my specific issues when source material is in need of +/- to a limited degree. I use a Mapletree router to help navigate the various components when not using my direct system.