Edgy, harsh & shrill come to mind, and the β22 is none of them. My warm comment needs to be taken in comparison to the β22. I certainly would not call the Krell a heavily colored amp by any means. When A/Bed against the β22 however, the more warmish, slightly lush signature is noticeable. I hope you're not taking this as a negative comment, as the Krell is a gorgeous amp, and quite seductive.