I use a tube preamplification to help my active speakers...
It work...
But if you think tube/s.s. make a difference and it does, acoustics control of the room had more impact than almost any upgrade improvement... Acoustics does not replace gear design improvement for sure, nothing does; but acoustics control overpower anything else.
I just put a resonator in my room today...
Huge difference when well tuned...The difference in effect of the S.Q. aspects of sound when only one resonator is added at the right place and tuned as it must be , exceed all my other gear change since the begininng of this acoustic corner for near listening...