DD coil-how much better?

[Idaho hunter]

I ha ve a Garrett GTP 1350 with standard coils 7x10 and 9x12 and wondering how much more
depth could I get out of the optional DD coils

 

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[Seamuss]

The double D coil has a sharper tone with the signal and will pick up every item you want to find. It can also sound better between different items. A dealer can explain it better then I can.

 

[Sundancer]

I have a 10" DD on my DFX. I love it for the extra depth, however pinpointing is a bit more difficult as compared to a concentric. If youjust do an 'X' pattern, you will get very close though.

~Mike