So I know that human don't hear above 20Khz. I have read somewhere that if a tweeter goes up that high it means that it will be very easy for that tweeter to play the notes up to 20K since it is not near the drivers threshold. Resolving in a very good smooth tweeter? I see that all the MB Quart Components have tweeters going up that high but read that they are known for a harsher sound. Any clarification on that matter will be nice. Are MB Quarts known for a good nice sq component set (discus) series? Thanks