So between all the ones you posted, which one has absolutely the loudest high end on the earpiece? Or is it that they all are the absolute loudest, but the coarse has larger stepdowns with adjusting, and the fine has less of a stepdown with adjusting?

I'm starting to think I'm deaf from a partying lifestyle in my youth, and loud pipes on my bike now. I really like it blasted.

Your hack definitely made a nice little difference, thanks for finding this! Cant wait for you speakerphone hack.