Harold, the CZs love iron.The Sovereign is the opposite and hates iron.With a meter the Sovereign will ID targets in the Disc. mode at very deep depths.The Sovereign can be noisy with different tones caused from the ground and targets.If you hated the Explorer tone,you probably won't like the Sovereign.The Sovereigns ID is very quick not delayed like the Explorer.One of the advantages for me with the Sovereign over the CZs I can hear deep targets better,my hearing isn't the best either.One thing that amazed me with the Sovereign in old parks I can ID the difference from zinc pennies,Indian Heads,copper pennies and early copper pennies they will have consistent readings for each different group. HH Ron