In the advanced settings of the A20 under ‘DAC filters’ is the option to put ‘High Sound’ and ‘Heavy Load’ on or off. I have experimented with them and to my ears the sound is a tad more friendly with these set to off. Might also be my imagination. The point is that the title of these settings is all info I have. Maybe it is an idea to add a short description with these settings? Or with all DAC filters settings as a matter of fact: titles like ‘high current’ or ‘short roll off’ don’t tell much.

It is just a small thing, the settings don’t make a whole lot of difference and the A20 sounds great whatsoever. But experimenting is nice, knowing what it is you’re doing is better.