I recently posted this to another forum and thought it might help benefit others and maybe generate some interesting discussion here. A booster can only amplify whatever the detector audio delivers no matter what anyone try’s to tell you. The inbuilt booster speaker system in the Minelab GPX 4500, GPX 5000 is too coarse for effective use via the Target Volume control, this same control is also used on the GPZ 7000 in conjunction with the WM12 and is also too coarse!  I originally popul