Do you usually set the tone controls of BASS and TREBLE of your vintage McIntosh preamps (C20, C11, C22, etc) at a neutral position? Some of you prefer to set them at the neutral position all the time, but others like me don't. In my case, I set Bass control of my C20 at 0 or neutral, but Treble control at the 5 o'clock position for a more dynamic and clear treble sound when I listen to jazz. According to the C20 manual, for example, turning the BASS and TREBLE controls to 0 is recommended for proper balancing. How about you?
I use the C29 tone controls when listening to vinyl, and not at all listening to digital.