I have similar set up as you, Roon --> Volumio Roon bridge plugin
Believe its the headphone out not DAC component. DAC was quiet good. For me what I was disappointed was its lack of imaging and narrow soundstage more than the fact it lacked detail.
Have returned mine but not because of the SQ, as I got this as a MQA DAC, but was because of the heat issue.
Now got DX7 Pro, this definitely has more detail and sound stage than EX5 but not by much.... EX5 still great value AIO unit I believe.
None of this makes sense. The EX5 I have had running for a week and it's barely warm to the touch and it's outputting my monitors and headphones.
For others who may have read this ludicrous post, there is absolutely no heat problems with the EX5. I have run this at high gain with r70x for months now, the 1/4" output with various other headphones, used XLR output and it's been feeding my monitors. It's the entire system for desktop, absolutely no heat issues. This is a blatant lie.
Don't really care about your golden ears that can measure added detail from the DX7 Pro from the EX5, I'm guessing it's $300 more detail.
@Yorkshire Mouth continue looking in the folder, there are plugins and PDF that help you setup ASIO, if you are using Foobar2000. I think there are instructions for other players as well.
@Chromatischism yes his other device is juicing other sounds, it's called distortion and noise from tubes. He's comparing a solid state amp to a tube amp. /shrug whatever.