Ever since the my first Explorer XS about six years ago I have used normal and used Audio-1 only when I went to the gulf coast where the targets are few and far apart. Well, now the parks around here have almost dried up, so I started using audio-1 with a coin program where the upper right corner open and the nickel spot open and I start swinging away until a get a coin hit then I shorten my swing over the signal. I am realy enjoying this way of searching and this is with my new 14" Excellerator, most of the time I have a threshold but even in the nulls I slow down and still get hits. In the past two years I have switch over from ferrous to conduct and have found more silver coins in two years then the prior 4 years in ferrous. Yes I know iron can have a high tone in conduct but in conduct I use iron mask -14 (only in ferrous can you use -16) or a coin program which would equal -12 across the top of the screen, this will kill most iron high tones and a iron high is different then high tone of a coin. Try this, take a small piece of iron and set it right next to a silver coin, in ferrous the high tone of the coin sounds mixed up but in conduct it still sounds the way a silver coin should. Two summer ago I found 19 silver dollars mixed with iron pieces bigger then the dollar itself and I was in conduct and I did try ferrous there to see if I could find more but the tone was way off...