From what I read on Crutchfield's website it states that 'The auxiliary source must have a output voltage of 1 volt (or less), or a volume control to adjust output level."
http://www.crutchfield.com/cgi-bin/S-75vZkJtRRuv/ProdView.asp?a=&s=0&g=50900&id=essential_info&i=130CDRB10
So I should be safe with the empeg's volume turned down a bit.

You wouldn't happen to have the color codes so I don't have to break out my meter??

Thanks again!!! Now I can get rid of the Cassette adapter (ewww) that I've been using since Sept of 2000!