Good video Sinclair, you are exactly right. I have had my Equinox 800 for 2 months now, detecting six days a week only on beaches and in the sea here in Spain. The main difficulty in Beach 1 with the 2 € coins is that they sound more or less the same as a pulltab. For the last 6 years I have used an AT Pro, pulltab - 53 2€ - 65 1€ - 75, in addition pull tab has a distinct double tone and a harsh sound, and the iron audio button is much better at identifying beer bottle crown caps than the all metal button on the Equinox.
The Equinox goes deeper and is more sensitive and stable and is a great machine without doubt. I am not trying to compare here, just giving my experience. In my opinion for a machine that has two dedicated beach modes, it is not the best machine for coin shooting on dry sand. I also have a problem in the sea in beach 2, still trying to sort that one and will make a separate post about that later.
Happy hunting