UPDATE ON EQUINOX 800 AND DIVING WITH HEADPHONES:
I went out to a river and detected under the water completely about a foot under. I used Tony Eisenhower's headphones for the Equinox but there was no difference in sound quality than with LS Pelso. Slightly better than the Koss.
Tony's are perfect for the Equinox above water. Meaning, you can have your shaft and coil in the water and as long as the headphones are above the water, you've got the best ones on the market against wind and other sounds like from the waves. Hands down his are the best.
I have contacted over 15 metal detectorists who do diving on a regular basis throughout the world and who use the Equinox. Out of those 15, seven of them have used the detector to dive under the water in shallow and up to 10 ft. Those seven people used the Equinox with Tony's headphones and tried all of the other headphones except the Amphibian 2. All of the headphones have failed to be heard under the water. they had exactly the same experience that I did. I talked to divers that dive every day. In Hawaii, Mexico, Australia, Florida etc. They use the Excalibur 2 as their main tool. but because they liked the Equinox so much, they wanted to use it in the shallow under the water but they can't hear anything just like me.
One well-known detectorists who has a video channel shows himself diving 8 feet under the water with the equinox and using the Amphibian 2 headphones and he said that he can hear okay. He did change his tone settings to 20. That did not help me any using Tony's headphones.
One detectorists said that because of the digital signal coming through the Equinox, it does not allow headphones to give out the necessary output as opposed to the Excalibur 2 which he believes gives out an analog signal. You all could tell me if that's correct or not. But regardless, it appears that everyone is pretty much happy with the Excalibur 2 audio signal output even with those horrible Koss headphones. Those that switched out the Koss headphones and replace them with Tony's for the Excalibur 2, are much happier because they stay on your head as I found out as well. The sound is better, as well for the Excalibur 2. So these are two different experiences in comparing the detectors.
I will give an update regarding the Gray Ghost Amphibian 2 experience with the Equinox underwater in the next couple of days. It should be coming in today or tomorrow for me to try out.
So far, we can conclude that nobody is happy with the audio underwater with the Equinox and therefore unless a miracle happens with the gray ghost, I will not be able to use the Equinox for underwater diving unless I rely only on the display and just hearing a faint signal that will alert me that I'm at a target. one of the guys in Hawaii said that that's what he has to do when he uses the Equinox in very high metal content areas that he is doing searches in. The Excalibur does not perform on that level in those highly iron deposited areas and so he uses discrimination more on the Equinox and he has to go by the display panel rather than by hearing the tones and volume changes. He has to hold his breath and listen to any target signals to get him in position to look at the display screen and then decide whether he wants to pinpoint it or not.
That is exactly my experience so far with the Equinox underwater.
I'm not interested in that kind of detecting while diving especially when I can't see a thing underwater and most likely not be able to see the screen and barely hear anything as well because of the problem with the signal in the headphones. Not a fun experience!!! I will just have to go to another detector. It appears that most people are happy with the Ex-caliber 2 and even in heavy metal environments that they just use the detector to clean up the area underwater where they are searching or hunting and then look for the smaller precious metal target that they are looking for.
I'll keep you all updated.
By the way, I already told Tony my findings. And I told him what other people have experienced with the Equinox underwater. It doesn't appear that anything will help with the underwater signal coming from that detector. But I will try the Gray Ghost ones for the last attempt which Tony helped to design by the way.
Brian Rudolph