After 3 years, I still don't have a clear answer re Speakers and Frequency

[AeJe]

1) if i found a speaker that has 190 Hz-20 kHz = is this good for ULTRASONIC? can the "Hz" on the left side be anything so long as it is 20kHz on the right side?

1) The ultrasonic track is centered at 17.5kHz if I remember correctly, and then add some to the sides. So the needed frequency range is something like 16 kHz to 18 kHz. Or 15-20 to be sure.

3) i bought soundfreaq last year for AM6, and i did the SOUND TEST and it passed with flying color, but i talked to SoundFreaq and they confirmed that the model i bought is NOT 20kHz . . . can i still use this speaker even though it aint 20kHz (meaning can i use it for BOTH ULTRASONIC and MASKED?

Get the Frequencee app for your smartphone, or borrow someone else's phone, and play some tracks. You'll see how the speaker test works and you'll see where the ultrasonic audio lies.

thank you for the suggestion, will def do this!