I have had my RS6 for a couple weeks. The only direct comparison I have currently is R6 2020. The obvious difference is R62020 is detailed with more clarity. That said RS6 is a ton more musical and has a lot more "dynamic" sound quality. RS6 is an easy to tell notch up in quality of sound. RS6 is heavier which makes it feel more solid. The copper IMHO looks great. With my sensitive IEM (Phonix) the background waterfall noise is not tolerable with R6 2020. With RS6 it is extremely faint and not an issue at all.
Yes set the volume control to something low like 50 or lower. I keep my max at 35 just because I listen at super long volume due to my crazy ears. I hear every noise. Hence the issue if the background is not black. You get used to not swiping up accidentally when that volume half circle is on the screen. I like it for making finite and not finite adjustments. Setting max volume is key. I also like setting my charge to 80% max. Better for battery in the long run.
I have noticed that when charging and battery is set to a certain % that when charging when the DAP is on that it will stop charging at that %. When the DAP is off it will keep charging to 100%. Anyone else noticed that or am I losing my mind as usual? I keep the DAP on and put in airplane mod when not listening so it is not an issue for me. Turning on and off with each listening session seems to be straining on the device. Like a computer etc.
The R2R is a pleasure. Super musical. Works fine with all my IEMs. I could see having a bright DAP as a contrast. I do have Jot 2 and Bifrost 1 as a detailed/clarity contrast.
From memory I like the amazing mids of the RS6 vs. M17. I am guessing from memory that DX300Max would be a good detailed contrast DAP. DX300 from memory seems to be in the same family of warm musical sound as RS6.
The vocals from the RS6 are the best I have ever heard.
That is all I have for now