I listen to an iPhone 4S. I have the MEElectronics M9 which I know are budget. I love them however I have never heard anything else aside from a few budget Koss lines. I'm looking to get a really nice bass head set up for my iPhone. My question is: should my next purchase be an amp? Or is the headphones which are cheap (but IMO awesome!) the bottleneck here? I'm just so new to the amp idea in general I'd rather make a move on that front if deemed necessary. OR should I just start looking at a better set of headphones altogether and skip the amp?
Thanks in advance, any info, links, or recommendations are extremely welcome!