In article ,
Arny Krueger wrote:
That's a bit of a broad statement - some headphone outlets are simply
an attenuated version of the main one.

That's part of the problem. The attenuator generally increases the
source impedance to the headphone, which alters the headphone's
effective frequency response for the many (but not all) headphones that
have highly non-uniform impedance curves. Some headphones are sensitive
to this, others are not.

Indeed. However, headphones that don't work off a 'normal' output should
come with a warning.

--
*Remember not to forget that which you do not need to know.*

Dave Plowman London SW
To e-mail, change noise into sound.