I just got off the phone talking with the folks at Garrett, and they were telling me about a group of relic hunters from Virginia, who strictly use the Infinium and listen for those deep barely audible repeating sounds. Those are the ones they like to dig. Apparently they are having some great success with finds this way. The soil has a lot of that red clay which is quite high in iron, and the Infinium works well in this highly mineralized soil. The large mono coil seems to be their favorite here. One fellow dug ( he actually measured it) a pop top at 27 inches. And after personally using the Infinium for a number of years.....I believe him too