How do you adjust the noise on the andis headliner trimmer

SOURCE: Andis trimmers are making loud noise when used outside US

i have the exact same problem, i bought them with a transformer. I turned them on and nearly deafened me! it is soo loud and when you turn the screw on the side, the noise stops/goes quieter but the blades dont move! If anyone has any solution please helpp!

SOURCE: Andis trimmers are making loud noise when used outside US

First off all when buying a step down transformer for these clippers or any other electrical equitment make sure u read the label check cycle 50/60 ,and watt transformer need to be the same are close enough,with is hard to get on tha market,get it made custom,I'm a barber and we have a little trick open your andis clipper ,get spong cut it neatly just a bit thicker than the space between movin part and amateur (coil) insert spong between,not centre bit top bit to blade that's where knocking comin from it can cause that movin bit to break,trim spong until u get it quit but able to cut ,note blade will get hot because of wrong transformer and can damage coil