Nuprime st10 or nuforce sta200, or parasound a23

You are correct on all counts. The volume control is a quarter versus where it was with my tube amps. Prior to purchase I was aware of the high gain and planning on purchasing a passive to place between the amp and tube preamp which I will tomorrow. Besides this I have heard so little about the amp I am not sure what to expect.  By the way, do you leave yours on 24/7?

I leave all of my solid state gear on 24 / 7, unless I am away overnight or for longer. I cannot say what your ears prefer, but I have given up on tubes, for now ( which in a way is a shame, because I run horns ). At 64 years old, I am appreciating reliability, setting and forgetting, zero microphonics, zero noise, and tube replacement ( both the hassle and the expense ). I am also appreciating, with my passive unit and the STA 200, a very clean, fairly neutral presentation, in both tone, and musical melody ( sometimes referred to as prat ), which I feel not all components capture. Enjoy ! MrD.

I have a Schitt passive pre between my Rogue RP-5 and STA200. I have zu Omen defs which are high efficiency. The Schitt passive has added no artifacts or anything I can hear. I love my set up...I originally purchased the NuForce as an in between amp because My prior amp developed issues. Since adding the NuForce, i have no desire to seek anything else.