Yes, a tube preamp will bring a much warmer, fuller sound with a defined soundstage. Try some of the older preamps:
Audio Research sp-6b or sp-8. Or conrad-Johnson pv-10 or pv-12.
These will take some maintenance every 2 years, but are wll worth it.
Audio Research sp-6b or sp-8. Or conrad-Johnson pv-10 or pv-12.
These will take some maintenance every 2 years, but are wll worth it.