randomkid, I'm paying more attention to the detail you mentioned. Thanks Tilpo, Yep maybe that's the wrong phrase. It should read "Training your ears" TMRaven, Thanks for the tip, I'll try your suggestion. PurpleAngel, I'm using a sansa Clip+ with Flac files Firev1, Thanks it...

Hi,   I have the Sennheiser HD558, Audio Technica:ATH-AD700, the Etymotic HF5 and the KOSS KSC55 headphones. I originally bought the HD558 & Audiotechnica for home use, the ety for travel, and the koss for sport.   I want to try to pick the differences in sound quality between these...