Is this due to crosstalk between proximate wires

On Wed, Dec 16, 2009 at 12:14 AM, Monroe Eskew < monroe.eskew@... > wrote:
> A basic question-
>
> If you plug stereo cables into the A100 sockets, the "ring" part is
> grounded, and the "sleeve" part is unused.  In stereo signals the
> "ring" carries the right channel signal.  But if you plug in
> headphones to a mono A100 socket outputting and audio signal, you will
> hear the same signal in both ears.  Why is the right channel not
> silent  It seems the potential difference between ring and sleeve
> would be between ground and ground, which should be zero.  Can someone
> explain how this works to me
>
> Thank you,
> Monroe
>