Quote:
Originally Posted by kipling 
I did not care for my HF5s and returned them. They seemed quite inefficient with my iPhone compared to the Shure SE210s I had previously -- I could turn them all the way up without discomfort which did not bode well for traveling on airplanes. I did not burn them in though, so perhaps they might have improved. They seem to get good reviews here and elsewhere, so I was disappointed.
The HF5s and SE210s are entirely different signatures. Maybe you preferred the SE210's signature better. On airplanes, HF5s will destroy just about any IEM in terms of isolation. As for turning your volume all the way up, you should never do that. HF5s don't change much with burn in, treble softens a bit, that's about it...
