subs with stock headunit

my girlfriend has an 03 explorer with an indash six disc changer, she wants to put subs in her car, now i have another friend with a 02 expedition that has a stock sub, how can i easily tell if she has rca outs on the back of her stock system in the explorer, i don't feel like taking the dash off cuz she isn't gonna get rid of her in dash changer?



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I don't recall seeing rca inputs/outputs on the back of the indash 6 CD. i have the factory sub on my 02 EB.

It's really easy to remove the radio and check it, should take you 5 minutes or so. This should help:
http://www.rampslides.com/explorer/radiobezel.html

Mike