I can't get more than 5" depth in Disc mode on a 14K gold wedding band or a zinc penny. In All Metal I can hear the threshold change slightly at 10-12" away, but the light won't come on until about 5" away from coil. Does this sound normal for this detector? I just got it (used like new) and am not sure if something is wrong or not. Also the red and blue lights have the same tone (low) and the middle white light is higher. I thought the tone is supposed to increase in pitch from red to blue (3 different tones). Any thoughts or tips would be appreciated. Thanks and Happy New Year to everyone!