good advice..
TURN YOUR SENSITIVITY DOWN!!!!!!!!!!!!!!!!!!!!
You LOSE depth if you use too much sensitivity. I almost NEVER use a sensitivity setting higher than 6-7.
I found this to be true especially with my newer models like Outlaw and Vaquero, more than my older Tesoros. I think that the newer models offer more gain than the older ones, but that's just my theory. It's quite noticeable with my Outlaw, where I'll lose shallow quarters when sensitivity's too high.. If I notice that happening, I'll lower sensitivity and adjust GB a little more negative, which improves target response.
Wherever ground minerals are high, I need to run more positive on the ground balance to compensate. I then have to cut back on sensitivity, otherwise I won't get a good target response, especially on large, shallow coins. I think that's related to running so positive on the ground balance as well as the increased ground minerals reflecting more noise back to the detector.
If I'm hunting in a deep, compost type soil though, I can crank sensitivity high, run a negative ground balance... and see really good depth.
BTW - my Vaqueros airtest about 9" on a dime with the 5.75 concentric (pretty deep). They'll actually get about that same depth in the compost type soil,
but lose a couple inches in more mineralized soils...like where I usually hunt. Good thing we have the GB and sensitivity adjustments.. I need to adjust my machines several times while I hunt, as I go from real "soil" in spots to fine gravel and rocky clay "dirt" in other areas.