Last fall my computer went south just got it fixed so its been awile , I just could not du whithout my compadre so I got another and this time i voided my warenty by going into it and turning up the sensitivity to maxand adjusting the ground to handle more mineralized soil this had a noticible afect on its depth now it is at least 1.5" deeper for istance i now have no problem air testing a dime quarter at 6" and in my ground which is mineralized i get a dime at 4.5" deep and a nickle at 5" no problem and quarter and if you slow the sweep speed down you can get coins at 6" in ground but you must slow the sweep speed its still not as deep as my musky which can easaly peg a dime at 9" but it does some thing the musky cant so it staying in my arsinal great detector ummm hummm [/b]