The K11 is not a streamer, it’s a DAC.
And it’s not Roon Tested.
Did you connect it to a Roon server via USB?
Is your server running Windows?
Did you install the correct USB driver?
How did you set up the UAC settings? UAC 2 or UAC 1?
If you want to control volume by Roon, you have to set setting VOL as ADJ.
I set it to MAX, because I use SR11 with K11 R2R as a DAC and a headphone amplifier, so I adjust volume manually by K11.
Well, it’s pretty good, especially for the price
I use it for late night headphone listening.
And I actually bought it as a gift, but the package was a little dented when it arrived, so I kept it for myself
The only thing I should note is that when paired with SR11 via USB and using it in Roon it does not support DSD256, only DSD128 (don’t know why )
SR11 and K11 themselves support DSD256 (DoP).
If that matters.