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May 21, 2026 - 04:21 PM
DD coil technology uses overlapping D-shaped transmit and receive windings to reduce ground interference and improve target separation in mineralized soil, which is why the INV56 performs well in challenging ground conditions. To understand how DD coils compare to concentric and monoloop designs, and when each coil type excels, visit our metal detector technologies page. That resource explains the physics behind coil configurations, frequency selection, and ground balancing, helping you choose the right coil for your hunting environment and target types.
