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Hombre
Hi Todd......

in answering question #1...yes, the number of filters affect sweep speed, 2 filter Tesoros require a slow sweep speed. 4 filter metal detectors like my White's XL Pro and 5900 CB require a faster sweep speed. All Tesoro models are 2 filter with the exception of the Sand Shark which is a pulse induction instrument.

Question #2 The Bandido µMax has 2 filters.

Question #3. I can literally crawl my 2 filter Tesoros to where they are almost stopped. I use this technique in heavy iron infestation. In my mild soil in cleaner ground it takes 2 or 3 seconds to cover 3 foot sweeps. Just my honest opinion.