Yes it can be done. *The device needed, that we use is called a "JBS
audio activated speaker switch" and is available from Amusements Plus
in NY.

http://www.amusementsplus.com/

I didn't see anything about that device on that web page or after
doing a google search.


Let me reprase my question. Please note that the juke was made in the
mid 70's and other rock-ola's used this same amp. On the amp there is
a section that lets someone install a microphone kit (I think, as I
not looked at it in a while). I need to know what pins go to audio,
Ground, and mute relay. Then how would I wire it so that I can turn
the mute off and on via a togle switch or some other means? If there
is another way to add external audio that is more simple, then what is
it and where can I get it?

Thanks for any help,
David