How to improve power supply?


My pre has a separate ps and it's very inadaquate.
It's from the mid 90's. What are the most important parts upgrades since then?
ptss
I've just come back to this post. Rodman, I'm finally getting around to my gear as I may need to send my pre back to Spectral for some type of switch for changing phase. I'll research your info again and post more soon.