I air tested a silver dime.Disc at 9 o'clock, sensitivity at 12 noon due to electrical chatter. in disc mode, and got 10.5 inches, which was going downhill like a sled..No juice in the battery..That is a fifty dollar air test..You put your fifty down, I put mine down, get, at least 10.5 solid inches, and walk away with your money.. I believe that The 750 is DEEPER than the gold..Do you have a valid e mail for the company.?..Going to shorten the cable,get a power source, then go out into the world and really, air and ground test this monster..Still half a dial to go on sensitivity, and All Metal to play with.?????....And, just to show that my heart is in the right place, I'll let someone else call the distances. To compare to the Vista RG 750, I have a modded Vaquero.. The Vista is DEEPER and at home as a DEEP relic hunter.The "V" is a yard, and soccer field machine. Difference in depth, with a faulty power source, 1.5 inches..Am sorry that I can't run real world comparisons now.To tell you the truth, I would like to see Deep tech, and Tesoro team up............