It would be very strange for a streaming service to be "hissy." When you play a YouTube video (the sound from it), does it sound hissy as well?
Turn the volume on the phone all the way up, unless that causes distortion, then turn it up as far as you can without distortion. Control the volume with the main volume knob on the amp.
I don't have anything else hooked up to receiver , just antenna and I use Bluetooth.It would be very strange for a streaming service to be "hissy." When you play a YouTube video (the sound from it), does it sound hissy as well?
I'm not sure, how can i check and/or upgrade?Do you have the latest Bluetooth 5.3 higher fidelity?