Quoted from hawknole:I searched ‘Whitestar potentiometer’ with no luck, try ‘Whitestar sound issue’
This is what you were looking for and it does work. Whitestar boards have insanely loud noise floor because of high gain. This mod is very easy and works wonders. I made my T3 silent after going crazy trying to figure out why it was so loud.
Edit: Link didn't get copied.
https://pinside.com/pinball/forum/topic/tspp-speaker-humbuzz-fixed