A high gain detector that includes high frequencies like the Equinox tends to sound off loudly on small targets. These may or may not be round and solid. A good way to check them is to use the cross sweep to test the consistency. Where you see a dramatic change in sound and meter reading—suspect junk. For more Minelab Equinox Tips, Settings and Information check out my page and blog at: https://clivesgoldpage.com/
My best Equinox find–its 18K.