On my D10 and R15, both are hooked up to 4:3 TVs, setting the aspect to 16:9 has no effect. I did have an old hughes SD hooked to my Mits DLP for a week or so before I got a HD receiver, and the aspect setting on it had no effect on the 16:9 TV either. Had to tell the DLP TV how I wanted the incoming 4:3 displayed. So we are all still guessing as to what the OP receiver really is capable of, since it's not a model we can investigate at this point.