On Fri, 23 Sep 2005 00:21:38 +0100, "Sparks" wrote:

Is this possible, and if so, what do I need!

No it's not. You'd need to switch the amp input signals, to prevent
the output stage on one unit "seeing" the other. As the iPaq almost
certainly doesn't have a mute on guidance it's unlikely that this will
be a practical solution, unless you intend not to listen to the head
unit whilst you're using the navigation.

Jon
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