I have a Spyder Installation. The thing you should know about is there is not a lot of room at the back so the cables/wiring and stuff will need to be carefully folded up as the cage will "crush" it against the back The next thing is you need a double din adapter if you wish to make it fit right with the alpine deck. The alpine deck will have a trim ring around it that will need to be cut.

I know this because *I* have an Alpine deck happily coexisting with the empeg. It feeds into the aux-in on the empeg.

But if I had to do it again, I would take the alpine deck out entirely because it is not worth the trouble. I never use the alpine deck and it just looks bad next to the classier looking empeg.

Calvin