Absolute Self Confidence IN 5G!!!!!!

[Shannon]

Mango has it mostly. Basically, it doesn't matter if you can hear the speaker test all the way through. It matters if your speakers can reproduce those frequencies without going staticky. The ultrasonic subs use a range of frequencies that starts at over 12 kHz and tops out at 20 kHz or 22.5 kHz, depending on certain factors. In order to properly reproduce the audio in that range, you must be able to play from the lowest to the highest range without trouble. Otherwise, the effect will either produce static instead of ultrasonic audio, or it will damage the audio and potentially render it unintelligible to your subconscious. That's why this is important.