Thank you for your helpful replies.
I believe that I have to get my ears cleaned out and change the style of how I hunt using these headphones.
I used a decibel meter app on my i-phone called Decibel 10 (free) to record how loud the speakers are
As a base level 42db was recorded in a quite room
With the settings Joe provided and the mic right against the earphone speaker, I recorded 47db
If I cupped both speakers over the mic it went up to 53db
I can barely hear the threshold at these settings in a quite room, but a target sounds good at 82db using a dime 2" in an air test with the speakers cupped over the mic
I have to raise the threshold to 40 to hear it well enough over background noise of the ocean with 2-3' waves and top that off with all the noise from hundreds of people and the wind. I was concerned that with the threshold that high smaller and deeper targets would be missed. And that kinda proved true because I recovered $15.75 in quarters, $.37 pennies, $.80 dimes and $.35 nickles. It's not a bad day but its skued to larger finds and depths were at a max of 7-8" in the low tide wet sand. No rings and very few low conductive numbers, rings and foil; well let me clarify i didn't find any rings.
I really want to use these headphones above water, for obvious reasons. I like them alot, but I just wish they were louder without having to turn up the threshold so far. Perhaps its just as well a ctx thing; Minelab should have foresaw the need to provide an underwater machine with increased volume control. Well I rambled on long enough...thanks for all your help! and happy hunting.
88 db at 50
