Having some experience with the Nox 800, I do get better depth and more accurate TID numbers on large deep (Michigan) float copper targets at 5 KHz vs MultIQ.
I will need to confirm this in Field 1 mode as it is composed of more of the lower frequencies vs Park 1.
I am referring to 10 inch diameter or larger targets down 20 inches or more. I suspect that multIQ really shines with smaller targets in trashier environments as in tailings piles. It doesn’t make me happy to say this because now I need to go back and re-detect at several locations. I can’t wait for the 15 coil to come out.