OK, I agree that a keyboard with built-in speakers has to sound decent (don't know what that is by the way) right out of the box. But the sound as listened to through a PA-system might be another story. It's a fake to think that there are speaker systems that sound really flat. They all add some coloring to the overall sound and a manufacturer can't do much about that. I play my Pa1X-pro through different PA-systems and I tune them all in a different manner. Of coarse to my own liking, someone else might tune it in a totally different way.