I can compare the RB-1590 to the NAD M25, which I tried at home before returning it for the Rotel. I used four of its channels to biamp my B&Ws. To me at least, the M25 sounded really good, but I missed the airy highs of my old Rotel 1075. To me, the M25 just sounded too sterile and not exciting enough. When I hooked up the Rotel RB-1590 after hearing the M25, I found what I felt was missing in the M25. It was much more exciting and complex listening. Voices sounded more like voices and all sounds seemed to have more range and complexity, with equal clarity and way more powerful and even faster bass, at least on my speakers.
I dont know if this makes sense. But to me it was like the difference between a quality CD sound from the NAD and a quality vinyl sound from the Rotel.
I dont know if this makes sense. But to me it was like the difference between a quality CD sound from the NAD and a quality vinyl sound from the Rotel.