I have a JVC MD/CD with line in, and the empeg works great..
You'll only need to fit the power somewhere (Not the switched output from the Pioneer) and one set of output leads to your Aux in on the Pioneer.
It took me about 10 mins to pull out my tape player (which I was running in the same way as above) and fit the empeg, it's that easy.. =)

Jazz
(List 112, S/N 00030, 4 gig blue)