My car originally came with a rear window defroster which I think was about the only option it did have (318, AT car), therefore I always knew I would put it back in. Since the car was a 1 rear speaker car (defroster on the right side), I had thought about getting one of the adapter things Mopar used in the day to allow a speaker and the rear defroster to be used, but after looking at them I decided to build my own. Didn't look overly complicated and I like making things, therefore I present the following. Not done yet but close. I am going to put a screen above the speaker and I think some hushmat as inside the box as well.