I have my AK100 modded recently by replacing these two 22Ohm with two 3.3Ohm resistors to match the spec on AK100 MKII . And I think some action should be taken on the small cap after each resistors. But I just don't know the value of the original one. So just leave it there.
As of sound, after the mod, for IMEs, I have to set EQ to 0 on all band to get a preferable flat sound ( my personal taste ). I think the official firmware applied a default EQ to the sound if you disable EQ.