In the world of sound systems, you must have known that there is something called a high frequency driver or you could say Tweeter, there are two types of Tweeters that I know, the first one uses a coil + magnet and a piezoelectric tweeter and I'm talking about electric pizza where this device is a bit unique from the others because around its crystal or capacity is surrounded by a auto transformer air core. And please watch this video.
data enamel coil
All wire are primary and secondary ∅enamel 0.1mm
