Hovland HP-100: Success with vibration control

Wondering if anyone has had particularly good success in two areas of vibration control with the Hovland HP-100 preamp. One is vibration control for the entire unit such as cones. Another is vibration control of the tubes. Or maybe, as so often is the case, on paper it seems like you will get differences but on listening you notice no difference or can not reliably tell the difference. By the way, maybe the non-remote preamps, like the HP-100, should be made part of the solution of the national obesity epidemic. :-D