There's a stereo part shop that carries a lot of eclipse manuals. I can't recall the name of them. I was in a very similar situation to what you were in now. Just the person I purchased the unit from ended up being a douche. They had to order the manual though. I'm trying to find the name of the place for you.
how to use the **** thing and is there something you have to do to have the other out puts to work its only letting me use the low out wth the crossover on pass
Im in the same boat. I need a manual for an 8445. Eclipse wont sell or give downloads for any of there head units. They direct you to United Radio which will sell you one. I called and they wanted close to 60 bucks for the manual. Your best bet unless you are willing to spend the cash is find a member that is willing to copy the manual or send one to you so you can copy it or find a shop that has one laying around.
For mine they wanted 12 dollars and another 8 to ship the manual. So it might not be bad. You could always search it on ebay if nothing else and send the seller a question see if they can copy the manual for you.