We were setting up my sound on stage before our show and the sound guy yelled at me for having the master volume on my HD500x higher than my master volume on my DT50. He said i would compress the tubes if I have it set like that. From what i have read on this thread this isn't true? Now im kind of confused and hoping someone can clear it up because It sounds like you guys know what you are talking about. Basically I'm wondering if it will hurt my amp having the master volume on the HD500x higher than the Master volume on the DT50, Thanks!