The key to using the X3 and X5 to search for deep targets is to listen for weaker, softer, repeatable signals. Targets in the fringe area of the detector's maximum range can produce intermittent or broken signals on good targets. The way to distinguish a good target from iron when the signal is intermittent is to remove a few inches of soil above the target and listen again. If the signal improves, then probably it's a good, deep target. If the signal continues to break up or gets worse, than it's most likely a small to medium size piece of iron.

Here's a method you can do to learn what a deep signal sounds like when searching with the X3 and X5 in the discrimination mode: First, locate a small area that's completely clear of targets. Next, set the discrimination control to 3.5 and place a nickel in the area that's free of targets and start sweeping your coil over it while raising the coil slightly with each sweep. You should notice the signal becoming softer and weaker the higher you raise the coil. This is the audio modulation of the X3 and X5, and this really saves a lot of time when searching for deep targets. You will instantly know you have a good, deep target when you get a soft, repeatable signal

Here's another method that is widely used: Many people use boots or shoes that have no metal in the toes, shanks or eyelets when detecting. They drill one hole on each side of a nickel and thread the shoelace of either shoe or boot through the nickel so it is positioned flat at the top front of the foot. When using the method above, this is an excellent, easy and quick way to develop an ear for deeper signals as well as check the operation and performance of your detector while in the field

To summarize listening for deep targets with the Shadow X3 and X5:

1) Listen for soft, repeatable signals.
2) If it tries to repeat, remove a few inches of soil and check again. If the signal improves, it's probably a deep, good target. If it continues to break up, it's probably a piece of iron. (Note: Loud signals that break up are almost always shallow iron)
3) Thread a nickel through the lace of a metal-free shoe so you can practice listening for softer, repeatable signals as well as periodically checking the operation and performance of your detector.

Troy