(the first two bands are worth nothing, because the frequency range starts from 130hz) This setting also work with s20/s20+, since they have the same sound system. I recommend using these settings with high quality audio files, such as flac hires.
For the best eq, for stock akg headphones:
v1.0, see post #9;
v1.5, see post #16;
v2.0, see post #43 (wrong post)
v2.1, see post #46 (the best).