Hey there i am trying to get rid of ground loop issues between my crown xls 1002 pre amp and my dennon avr 3700h. New to all this and i picked up a rolls he 18 buzz off . What is the proper way to install it between the pre amp and the avr? It says it intended to receive line level and to not connect to a speaker level signal (the out put of a power amp) any help with this would be appreciated . I have my pc with 3080ti ftw 3 gpu to a lg c1 oled and a crown acting as a preamp for the front tower sp-eakers,dennonn avr 3700h as well. all speakers in system are ,kef q 950,kef q650,kef q150 for surrounds, and kef c168 in ceiling . Issues im having are computer output is static in audio ,hum and when scrolling mouse on screen and random popping noises. Lifting the ground from the pc eliminates this but i know i cannot leave it set up this way ,the pre amp when powered off also seems to stop it. Also all connections for video and sound between components are hdmi, so i think i have 2 problems going on a ground loop and a interference issue.from what i have read about this so far im 2 weeks in in trying to solve this problem.I have the rolls he 18 here and would like to try it but dont want to hook it up wrong and fry something.