Good morning to all, I would like having an information about re-biasing of tubes. First, I am not very skilled but I know that the bias of my amp must being set at 80mV by the check station placed on the rear panel (I found 80mV on my handbook and the check method reading another forum). Substantially, I need knowing: 1-What sound differences I'm going to have if I set the bias a bit less than 80mv or if I set it slightly higher. 2-Is there connection (...in terms of good sound) between bias set and gain level? In general, what could you suggest to me? Thanks in advance.