I just sent my stock headphones in a few months ago with my At/Pro and tried them Sunday and they just didn't work like they used too or maybe I've just been using the grey ghost amphibian headphones too long. Hate to send them back again , but like the idea of having backup headphones. I try and use them when I hunt on land and this is the 2nd time in 6 months and I like them in the water because they are more comfortable than the grey ghost headphones. I know they have to fit tighter in the water, but the stock headphones are what I prefer on land. Does anybody notice a difference in the way pennies and other coins sound with the stock and with the grey ghost headphones or am I the joker in the deck here? Lot louder with the grey ghost and higher dvi reading also. Another problem I seem to be having is the iron audio seems to work when it's off louder than when I push the button to activate it. I tried increasing the discrimination to see if that made a difference, but it doesn't. Maybe I just need to get out more? HH.