Probably the best input is LINE, followed by CD (which is usually optimised for high-level, flat spectrum signal sources).

The empeg was plugged into the AUX input, so that wasn't the problem.

(This was really freaky: I read your message, hit reply and then noticed that your message has changed, as shown at the bottom of the reply screen. Went back and forth a few times, yup, there's more text in the reply screen that there's in the original message! Took me a minute to realize you probably edited it real quick. I guess I need sleep...)

Borislav