This is response from a Cambridge dealer: This is typical. 0dB is the maximum gain of the amp.This sort of control uses what is called linear taper. Older style control used an audio taper. With an audio taper, you get about 80% of the control's usefulness in the first half of the control's rotation. With linear taper, it is actually linear. i.e. -50 is about equal to a conventional control turned up about 1/8 of a rotation. It takes getting used to, but the benefit is incredibly precise channel matching at any volume setting.
Thanks Jack for your explaination.
Thanks Jack for your explaination.