Dared sl-2000 preamplifier SET preamp tips tp

I have several very good preamplifiers Hot toddler a rogue Athena,
Older Modwright,and rogue metis and the little inexpensive Daredsl2000a.
I have found by putting a few $hundred dollars into it .being single ended
It picks up noise very easy.for starters run the cheap Chinese tubes
Just for the first 100 hours ,they replace with quality N.O.S tubes.
I use for the rectifier5y3 the Bendix6106 built like a tank ,great Bass control
And dynamics. The 12at7 many choices .i look for Black plates they are 50s stock mainly and sound a bit warmer such as the RCA ,or Sylvania
gold label triple mica I use.also for around $100 signal cable makes a great
High purity Copper Teflon power cord,.remove the fuse on back
Crappy steel fuse to a Hifituning Supreme. Herbies footers underneath
And Herbies tube dampers on tubes,$350 outlay do tubes first
Now I love the sonics and ask for matched ,low noise tubes.with at least a x30 day warranty. It is now a $2,000+ sounding pre.
I even heard a unit with Vishay .1 naked resistors,and Mundorf Silver oil
Capacitors another $300, he had a total of $950 invested and shocking
In many respects as good as the $4k rogue if not better. Hard to believe but true. If you don't put the money in you will Never hear this preamps potential. The Metis even with good tubes is not as musical once you
Put good tubes in ,a decent power cord is also a must Herbies do work.