step1 you need a better preamp
furmans suck you wont hear any improvement look at isotek they work much better.but cost more
isoacoustics work wonders on the references we hads ours on them.
also upgrade the nucleus to a better server
https://432evo.be/index.php/2021/04/25/432-evo-2020-reviews/
we import the 432Evo servers from belgium the difference between the two servers is very audibile.
Dave and Troy
Audio intellect NJ
US importer 432Evo servers