So where should the tubes be?


Source, preamp, dac, amp? Or should they be in as many components as possible? Does anyone subscribe to such a system where there are tubes everywhere?  Base answer on acceptance of tubes somewhere.
jpwarren58
@pauly 

"I was just busting your balls as the term “mate” is often used to describe the activity that results in producing offspring. Matching is a more political correct term"

Politically correct term...lmao..now thats funny to me. I however stand by my terminology...mate... 
If you do it wrong your still screwed , right?