Addicted to Fun and Learning
- May 15, 2019
So the higher frequency distortion that Amir measured might not be a driver problem, but caused by the small L in the filter.In that pouch there is a filter. When I had to make an educated quess I would say there is a film capacitor (to tune the frequency), a 10uF bipolar capacitor and a 470uH SMD inductor in some shrink tubing.
Very similar to the treble filters I make but these have larger sized inductors and are mounted in a steel tube.