Thanks for all the great tips. I will wait for your POST before I do anything else. Take your time, I'm not in a rush...

Now, since I already tried connecting the following:
1) My red wire to the Shark Attack II AMP => Results: Reception not so good...
2) My green&yellow wire to the Shark Attack II AMP => Results: Reception not so good...

I'm thinking it might be the black wire that needs to be connected to the Shark Attack II AMP!!! (To me, black means ground...anyway... I will wait for your POST or buy a multimeter and find out which one of the 3 is power...)