Quote Originally Posted by Mike Anderson
I can play it at quite high volumes (probably ear damaging if prolonged).

It's one of the newer iPods (5G), by the way; perhaps the older ones are different.
Most "lesser" cans than yours are 50-120 ohms. This means that they can play even LOUDER at the same volume setting. No wonder people are taking Apple to task for creating the next generation of hearing impared.

Most of my headphone listening has been through my receiver, so I'm very interested to hear your report on the Bithead. Perhaps you can elaborate a bit more on it.