I am mainly listening to music playing media player classic on my PC through a USB connection to the Q Acoustics M20 Speakers. The sound is good, but I don't feel it is exceptional. Regardless of that, which might just be a wrong impression on my side, would things improve if I added an external DAC between the PC and the speakers? If so, which one would you mention?
The problem with adding an external dac is that you could be converting twice, depending on how the q acoustics work so in my mind a bit pointless to add an external dac. Before doing this shoot the manufacture an email to find out if the RCA’s are converted to the digital domain.
A far more likely problem, Pc’s are notoriously “noisy” environments for streaming music leading to less than desirable sound.
The usb cable might not be the greatest and lacks a little shielding, you haven’t got to go crazy here, if it hasn’t got one try one of those little magnets wrapped round the cables. They can help clear up any RF noise. But will most likely not change a thing.
If it were me I’d try a cheap wim mini/or a second hand chromecast audio first, then add some isolation stands to your desk.
Just my guess take it for what it’s worth