Submitted by Detector Ben in eastern Nebraska. He is an independent user of his new Apex testing on deep targets and his own test bed/iron separation. Comparison with the Nox 800. (I wonder what his iron bias and iron volume settings were on the Nox 800) He actually answered this question on another forum. He had his iron bias on F2=4 and his iron volume was on its lowest setting (which is why we could not hear it on the video going over the square nail). Sometimes the Nox will give an iron tone