If you look at the frequency content of musical instruments and the human voice, there is virtually NOTHING above 5 KHZ except for brushed cymbals.
In addition, few mature adult males hear much above 10 Khz anyway...lol.
I participated in a test at an audio show many years ago where people listened to the same sample of music 3 times. One had full-range sound, the second had been filtered to eliminate sound above 8 KHZ, and the 3rd had nothing above 6 KHZ.
90% of the listeners heard no difference whatsoever, and this was in a very quiet listening room using very high-quality electronics and speakers.
Originally Posted by kraut
There is fairly little content in music above 15 kHz. But lack of bass is much more perceptible.
The response should be at least to a clean 50Hz, for kickdrum, and any kind of stringed bass instrument.
I run a pair of heresies with single sub support (diy compound loaded), crossed over at 80Hz and achieve a well integrated response down to below 20 Hz.
I previously had used DIY satellite speakers (the size of book shelve speakers in d'Appolito)) with a similar setup very effectively, but prefer the Heresy sound.
Even very few floorstanders reach down clean to 20Hz.