Quote:
Originally Posted by zeno
Jacks often have built in switches. Example would be a TV with
both RCA ( composite) & a S video both on AUX 1. The switch tells the
switching IC which to "see". This way you can have multiple inputs
that can be used for more than one input type, AKA flexibility......
73 Zeno 
LFOD ! |
70s din gear was the same but more privative... there was usually a switch in the din jack to over ride the RCA input when din was connected.