Yes, I've tried, turned off any bluetooth device, hold the bluetooth button for some second and it worked. I had to put the mac book really close to the Amplifi, it's strange because there are just 2 meter more or less, but now that the two are paired i've put the mac book back in it's original position and it's still working, I can hear the audio but there is some glitch and sometimes the connection with my bluetooth keyboard is lost, it seems the signal is not good probably even my mac book is a bit old or could be also my body between them. Any way, it's working thanks a lot for your suggestion
Paolo