I have a 96 Maxima with the Bose system just a few months ago my audio shop added a 10 inch RS Self-Amplified Bazooka and Believe me it sounds very good. But my main problem is after I was playing the radio very loud I shut the car off came back a few hours later started the car and the radio wouldnt turn on! I checked the fuses and there both good. I was wondering if there is another fuse behind the radio or did I just smoked my radio?

 

I don't think that you smoked it.
Check the fuse box under the hood. There should be labels on the covers look for anything that has to do with the radio. You could check the back of the radio to see if anyting came loose, I think there is a fuse on the back of the radio. If the radio blew up you would smell something.
If you did smoke it, give me a hit.