Originally Posted by Fourstaff
I can tell the difference between using a UE TF10, iShit, Creative EP630, Marshmallows. Not too much difference between TF10 and Superfi 220, so my advice is look for something about ~$50-100 if you are going to use it on phones and other non-specific devices.
Oh you will be able to tell the difference, for sure. Higher quality headphones will probably sound worse, given that they will likely reproduce the quality problems with the music output with much better fidelity than lower quality ones. You'll get to hear all the MP3 compression artifacts with amazing clarity, and every single distortion induced by the (phone) player's sub-par sound-production circuitry.
I'm just not sure that's a desirable experience. Better off with Koss Porta-Pro, cost $25 and do the job just fine.