A lot of people seem to be concentrating on air tests, air testing is not a good test of any metal detector's actual ability in real world ground conditions. The ability of any metal detector will constantly be changing, depending on the current conditions of the ground below, the ground minerals, level of the minerals, the length of time the item has been in the ground, metal content of the target, magnetic interference near by and even the type and size of the coil currently being used.........
Excals and Sovereigns do not airtest well, but I have pulled up tiny targets well over 12 to 16 inches deep with both my Excals and Sovereigns..... I couldn't care less about how many inches my detector sees a quarter or dime in the air, I care about how deep it sees a gold ring with precious stones or diamonds under 4 feet of salt water and 12+ inches of wet sand, black sand or deep dirt......That is the true test of a detector....