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best coil for the GPX 4500


Active member
Which is the better coil for the GPX 4500. This is, of course, in a relic hunting situation. Is the Detech Spiral 15" better than the 18" DD Minelab? Unless you nugget hunters can tell me how and where I may find them here in East Tennessee...…...Thank you. What settings do you use with the bigger coils?
Are you looking for depth? If so the larger the coil the better. Mono coils will punch deeper than DD, but there is no discrimination with them. Nexus have brought out a concentric 21" coil for the GPX, its like two coils in one. The outer coil ring acts like a mono when switched to deep mode. When switched to hot ground both the outer and inner coils come into play to enable discrimination. This coil has two cables coming from it into a switch box which in turn connects to the GPX coil socket. This switch box has two settings, 'hot ground' and 'deep mode'.
I don't have this coil yet but I do have a collection of coils Mono, Anti Interference and DD. Including Minelab, Coiltek, Nuggetfinder and Deep tech.