On 31/01/2010 14:58, Dave Plowman (News) wrote:
In ,
David wrote:
"Brian wrote in message
om...

I wonder what the output of these devices is supposed to drive, impedance
wise?

Most headphones for portable players are 32 ohm.

Yup. And capable of driving to a true line level - although perhaps not
with the same sort of headroom as pro gear.


That 'line level' drive out of the earphone socket is usually with the
players volume control straining at the limit, and probably over the
limit that is judged safe to let loose on young ears. So not many
players make those levels connected that way. It's also hissy.

I much prefer using real line level connections (as with Apple)
available at the docking connector.

--
Adrian C