I took the advice of a friend in England with my MXT. First and foremost , purchase headphones with a volume control, if you choose not to use headphones with a volume control you can put a piece of tape over all or some of the speaker to nullify one of the loudest detectors I have heard. Without the headphones or the speaker covered you can start a stampede or possibly go def, whatcha say? Next I tested his theory and settings and it works for me, toggles- relic mode, ground. Knobs- gain max (this detectors circuitry was made to operate with gain at max) discrimination 0. threshold max (even with the volume down you can get a whisper and concentrate on that one area from different angles) You can operate with discrimination set to 0 - 1.5 or so. This is the setting where I'm pulling buttons from a depth of 9 to twelve inches, extraordinary. I would have missed lots of targets if I went by sound alone. Some targets have iron attached and it will give you a high and low sound and the numbers will jump + to -, in this case I would dig, for I found that you can have good targets with iron attached or very close proximity, this works about 15 percent of the time but yielded one of my best finds, the other 85 percent rusted nails. Also rust at these settings will sometimes come in with high numbers, 18th century cannon balls came in with a high pitch and numbers in the 80's. If your in the middle of a site like I'am and are pulling coins and artifacts from the 17 and 18th century, dig it all, and recheck the holes where you pull small and large iron objects from you might get a surprise. If you find that your targets are shallow you can turn down the gain to keep the machine from overloading. Hope this helps. This button was found with a rusted nail. Arty