Need your experience input

[ArcticFox]

If I have speakers or headphones well over 20khz but my android phone is the device being used to play the files such as bluetooth. From phone to receiver to 20khz speakers

And using phone to play audio that inputs sound through 20 khz headphones. Would it make any difference or is it recommended notcto use android phone to play subs?

Android phones are fine. Personally I try to avoid Bluetooth, there is no reason it shouldn't work but if I can use a cable to plug it in directly I'm gonna use that.