The last time I recall actually using the tone controls when I had them was to sometimes adjust the sound of one source when my system was tuned for another, for example digital versus phono. Also sometimes to get speakers in different rooms to sound more similar. My system is a bit unique in this way in that I have 5 pairs of speakers in 5 different rooms all hooked into the same system. Getting each room to sound similarly good to my ears was not an easy task.
Then I set a goal to get each source and room to sound as similar as possible out of the box. Once I accomplished that to my satisfaction, the tone controls sat mostly unused. Now, I have everything pretty well tuned to a particular sound regardless of source or speaker/room combo, so tone controls are not missed.
Then I set a goal to get each source and room to sound as similar as possible out of the box. Once I accomplished that to my satisfaction, the tone controls sat mostly unused. Now, I have everything pretty well tuned to a particular sound regardless of source or speaker/room combo, so tone controls are not missed.

