No can't agree on this. Starting from the impression on page before it's "more bassy". The bass is not (more) different if the frequency respond is flat, I compared my hearing/comparing + measured tests and it's the same results, the bass has no impact or change in any way to any other DACs I won like Chord Mojo, iFi audio micro iDSD and many more...
I did that same with LH Labs Geek Out 1000 vs iFi audio micro iDSD, both using the pretty much the almost the same amp section, only the iDSD has dual setup instead of single setup like the GO 1000. Both sounding with the same digital filter setting (standard) absolutly the same (my cans I used are the Sennheiser HD 800). After I changed the digital filter setting of the iDSD to "Bit perfect" the treble changed, but this we can measure again:
I know people "hear" different, but this is not a topic for the FiiO K1 thread. I know enough people they like me and I know a lot people they hear 100 changes on each single gear they try.