I was just wondering how loud the amp has to get in order to take advantage of the tube gain from the power stage.  I know I'm a freak, but I really don't enjoy playing my guitar super loud, but the DT25 being only 25w has me intrigued.  Especially paired with my HD500.  I know that it has a low volume mode, but that removes the actual tube power section for modelling, which kind of defeats the point of getting a tube amp  Might as well just run the HD500 direct like I am now.

Can you get good tone at a reasonable level, or does it need to get pretty loud to hit it's sweet spot?  In other words, if my wife was home watching TV downstairs, would I get yelled at for making my guitar sound good?