Nuprime st10 or nuforce sta200, or parasound a23

Based on the Goldmund circuit used originally in the JOB amplifiers, the STA200 has, besides what I have mentioned above, an extremely wide bandwidth. Put them all together, and you have an amp that will " amplify " everything, including distortions and noises from anywhere. I found that it needed about 200 playing hours to where things smoothed out and the melodic nature of the amp became coherent. Tubes would likely be rolled off in comparison, and / or with just a bit of added color and warmth. I am sure your preamp volume control is set lower with the Nuforce than with the tube amps. It's whatever you like...…..Enjoy ! MrD.

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.