I audition this amp about two years ago with the Consonance monos and it sounded great. I don't remember anything negative about my listening experience with Consonance. The sonic personality of the preamp was pretty neutral meaning it did it's job.
If you want more focus in the bass, midrange, or treble try swapping out 12Au7s with Mullards,or Soveteks.
Try upgrading to better PC and IC afterwards.