I'm planning to do the same thing you're doing once I've picked my new Alpine head unit. Currently, though, the CD receiver I have has a 1/8" stereo plug for AUX IN on the front of it. I am using the cable that came with a now lost portable CD player to connect the empeg's front channels. The AUX IN on this thing is only 300mV, and it sounds fine. You may want to fiddle with the volume in order to not have huge jumps in sound level when you switch sources, but who would want to switch away from the empeg anyway?