The Yamaha NS10, widely used in studios, sound like nails grating on a chalkboard. I once considered a campaign to rid the world of those things as the inherent screeching produced by them is an audio nightmare, and the reason for severe depression among engineers (a theory, but still...). I guess the reason for them to exist is that they're already in so many studios, but man...ban the NS10 I say...destroy them wherever they are...otherwise, hey, they're FABULOUS!