Hi,
I always hunt in Multi. The Equinox Multi IQ technology is the heart and soul of the detector. Using the selectable single frequencies turns the Equinox into a faster version of the X-Terra 705 with more frequency choices while using the same coil. If you want to totally handicap the Equinox....use it in a selectable single frequency. If you want to get the absolute full benefit of Multi IQ you have to run in Multi.
Here is an interesting and very thought provoking read. The writer was one of the US field testers for the Equinox and gave Minelab direct input (which they listened to) about the final version of the Equinox. Since the Equinox has advanced SMF tech that makes the ground more invisible than previous SMF technology including BBS and FBS, the topic that Steve addresses in this link is even more important and tosses a lot of single frequency do's and don'ts out the window.
https://www.detectorprospector.com/...cy-more-about-target-size-than-type-of-metal/