Yes, you can get splitters for phono or jack connectors. 
BTW, I used to work in hifi and the saddest cases were those people who bought an expensive rig and nuked it a few days later (or mabe even the same day) for the sake of a ten-cent plug, by stickytaping the leads.  Usually cut them with the power on, too, and wondered why the amp was giving out a burning smell all the time they were twisting them up.
                
 Lantash
                
 March 2007