Also thought female vocals can sometimes lack a sense of body and weight, making it a little ethereal and didn't quite stand out enough from the treble instruments. I just added a ~+3db @ 200hz. Can't quite remember the Q value though, but it was fairly narrow IIRC. It was quite subtle but thought that it helped with female vocals without affecting the overall sound signature too much, though it does make the bass sound a little more boomy/less tight.

EDIT: just opened up Peace APO for first time in I do'nt know how long and found the EQ settings. I last had it at 5db at 223hz with Q=2.6.