up2stream amp 2.0 v3 FND?

Hi,i have up2stream amp 2.0 v3 and on manual for output for connection on 4pin cable stay - rout ,gnd,fnd and lout (from left to right) what is FND?


Thanks

It’s a minor mistake in the manual, should be GND :sweat:

:slight_smile: Thank you! :+1: