what about this one:

15-20.000Hz

Are there earbuds ok to use with i-doser? I plan to convert the doses to mp3 (with sbagen and 320kbps) and i should not enable any software EQ in the mp3 player right? Sony Fontopia In-Ear MDR-X9 Plug: 3.5mm stereo, Gilded (Mini-Plug G) Design: Earbud (In-Ear) Type of Use: Portable, Sports Frequency...