I knew it was the fly back coil but I actually didn't know of it's function. I do know that a lot of people end up using it for plasma speakers and such though. <br><br>as for your ears, I am sorry you are losing the hearing and I feel you with that... I use to hear a pin drop from a distance but now I have to turn my sound up past the "can cause damage" limiter so that I can hear something other then muffled sound