I just made a video that shows a visual comparison between 1.8 um 99.9% Aluminium vs Stock Chinese ribbon mic Aluminium that is found in Lot’s of chinese made ribbon mics on the market. The video is shot at full speed and in slow motion to make things clearer. You will notice the extra sensitivity(movement) in the 1.8 um ribbon when both of the ribbons are excited. The ultra thin 1.8 um ribbon results in higher detail and lower self resonance in fact although a lot of people out there swap out the transformers in these mics, it is even more important to upgrade the ribbon as the transformer is only going to sound as good as what it is fed.
FOILS AINT FOILS! O.P.R RIBBON MICROPHONES