DD in mono, Mono in DD on 4500

[wick p]

Are there advantages using a DD in Mono or Mono in DD. Whe chasing small gold.

 

[EVIE/BEE]

If you've got a commander "10 X 5 DD" in mono you'll get lots of small gold if it's there, however not much depth.
A DD in DD is good in trashy areas because you can use the discriminator to ignore ferrous rubbish.