A Great evening to All. I have 2 of these machines with the same issue. When the Volume is set to Low or Medium, There’s an annoying hiss from the speaker. I tried shielding speaker wire and also using an audio isolation transformer. A small change with the transformer. After opening it up, I was surprised at what they consist of, (NOT MUCH). Does anyone have any suggestions of how to make this hissing noise go away? Or is this just Poor quality equipment? First time looking at a Arcade/Video game. Thank You for Your time.