Kijanki, I think you just want to argue with me for the sake of arguing so this will be my last reply to this thread. The simple truth is that although many speakers are reported to have highs flat to 20kHz, in actual use in an actual listening room the sound will be decidedly rolled off at that frequency by the time it bounces off walls, carpet and furniture, and goes through door openings. This, not to mention that unless the tweeters are aimed directly at the listener you're not going to get anywhere near flat 20kHz response.
Plus I wouldn't call the Ratshack meter anywhere near precise.
But hey, it's your right to believe what you want to believe. I just don't happen to agree with you.