I would not put much stock in what that guy opus 104 said.He's a bit of well how do i say it?A goof.
I own a piccilo.I use batteries and put auricaps in it.
I found no or should i say very little difference to just running my cornet2.I mean adding it changed the sound very little.
I think it's a fabulious product.I know adding a sut transformer changes the sound.My piccolo disapears.This is a very good thing.
I have auricaps in my cornet2 too.