Which fuse is best for sound system?

I have a 2004 chevy trailblazer and I recently put in a new sound system. So I had to remote wire from the cd player to the fuse box to get it power, and naturally I chose the radio fuse. But the cd player and the amp stay on when i turn the car off. I'm guessing its because the door chimes and lights run off that fuse as well. So which Fuse should I remote wire to so that the cd player and amp will power down with the car?