the excellent, and proven, MXT Pro.
Why, if the higher frequencies are supposed to be so great, do the Spectra Prospecting programs fire-up in all tree frequencies?
Why, when you check a couple of small gold nuggets with the stock setting, then select only the 22.5 kHz frequency, you don't really note any surprising improvement?
Why, when I have compared the Spectra's with an MXT Pro, using the same search coils, does the MXT Pro match or better the Spectra's performance?
Why is the MXT Pro my personal #1 pick as an "all purpose" detector?
Because it has a track record, dating from the original MXT, of being able to perform in a wide variety of hunting conditions, and has proven to be an excellent nugget hunting detector.
Besides, it has KNOBS and that makes for simple, quick adjustments as needed, and the battery life will be 2-4 times that of a Spectra series model.
Naturally, these are only my opinions so others might question them, but ...... compare these models side-by-side for quick-into-action performance and you'll see the winner, easily.
Monte