The QXT Pro is still in the top two as far as my favorite machines I've used over the years. Setting the tone alerts combined with it's ultra fast response makes for some easy pickings in heavy trash. Don't edit out any zones, including iron or ground (a deep coin can first only signal as iron or ground). Instead, just set low tones for the stuff you don't want and highs for the stuff you want to notice. I would just listen to the audio for a high peep among the lows in heavy trash. Noise reduction off for best depth. Usually sensitivity can be about 18 on the Pro, 16 on the non-QXT pro. Both are the same exact machine except the Pro appears to allow slightly higher sensitivity settings while still being stable. Keep tracking OFF and manually set the ground balance for best depth. Best way to set the machine up is to first load the coin program. That will set things like SAT speed the way they should for coin and ring hunting, then change all the other stuff after that. Of course now when you turn the machine back on it will still have the same settings for now on. VCO On. Pinpoint sensitivity at 16. No need for mixed mode as the discrimination mode goes just as deep as all metal, and in effect with all the zones accepted in discrimination mode you are hunting in all metal anyway. Used to be that some machines got deeper in all metal, but most modern machines I've owned get just as deep in discriminate.
