inputs.text: real ear opener - headfi since 1992 first introduction audiophile listening pair sennheiser headphones popular headphone amplifier nad cd player years ago updated setup new pair senns new headphone amplifier ipod liked setup portability found fatiguing long hours even low volume couple years ok setup yearn started research others upgrades cost effective ear opener experience ever since ripping music cds lossless files experiencing earvana ever since difference must anyone must get cable want use headphone amplifier whatever cost ipod full lossless files lod cable cmoy amplifier nice pair introductory headphones makes nice introductory audiophile heaven