It doesn't take much...a good tube preamp is all you need. Just make sure you buy one that uses tubes, that have flavors you are looking for....after all, thats what tube rolling is all about.
In my system I can change the soundstage between wide/pinpoint, or, more forward/recessed....simply by changing tubes.
If I want a tight, and more focused sound, I use my Amperex 7308's...a little more bloom, and a little more forward, I switch to my Amperex 6dj8's...ect.
The quality is still there...just presented a little different.
Dave
In my system I can change the soundstage between wide/pinpoint, or, more forward/recessed....simply by changing tubes.
If I want a tight, and more focused sound, I use my Amperex 7308's...a little more bloom, and a little more forward, I switch to my Amperex 6dj8's...ect.
The quality is still there...just presented a little different.
Dave