I have owned my Equinox since late 2019 and last year I found out just how good it is on nickels by accident.
I was hunting at an old school with a friend of mine who was using a 600 (I have the 800),
We had hunted here quite a bit last spring due the the schools being closed all year and found quite a few silver coins, and a lot of clad and even a few nice rings.
One day while we were there, my buddy stated he had found about 8 nickels. Up until then I had dug some nickels, but really did not focus on them.
During the remainder of the hunt, I started focusing on finding nickels since the high tones were getting scarce and in a short time I found about 6 which surprised me due to the amount of trash there.
Since that day I have found a pile of nickels.. in fact more than I have ever found before including 40 in one day at a school yard.
I have read a few posts about this subject and I disagree with those that say the Equinox is weak on nickels. Coming from the Sovereign GT which was very good on Nickels, I feel the Equinox is just about as good.. at least from my experience.
I found 423 last year alone... anyone else find more than that with other machines?
Now, about this original post.... personally I think notching 10,11, and 14 out is a big mistake.
I have had nickels read anywhere within these numbers, but but mostly 12-13 like others state.
I have seen 14 flash for an instant, but have not found any nickels that read 14. still I use it as a reference on iffy signals.
I have had nickels lock on at 12, 13, 12-13, and seen others flash numbers out side of this group, so having those other notches in gives me more information.
I have also seen the readings vary from site to site, which is another reason I do not notch those lower numbers.
Now I am also using 50 tones, which I know is controversial, but I find it gives me more information not only when looking for nickels, but other items also.
As far as depth ID accuracy, from what few deep nickels I have found, they seem to Id pretty good.. but I still would not recommend to notch out lower segments.
Another thing no one has mentioned.. war nickels, I have found those that read like a standard Jefferson nickel, while others have read 14 (you'll leave this one if you notch), 18, and as high as 22 on my Equinox.
The key to finding nickels and not so much trash is to slow down, do not notch out lower numbers, and listen.. do not totally rely on the TID.. another reason I use 50 tones.