I have a Pioneer head unit that i run in conjunction with my empeg. When i ran the cable for my empeg i put a set of RCA spliters and used them as a way to run the two decks into one line. i did this because i didn't have a tuner, and becasue if a friend had a new CD for me to listen to, or i bought one i couldn't wait to here then i could use my CD deck. I gald i ran it this way becasue my Empeg has been in the service department of RIo more than i have used it. This setup works great, the only catch is that to listen to my Empeg i can't turn off the Pioneer or i get half the volume. I know why it does it but i cant explain it.