The wife & I took two GB Pro's & one G2 on a hunt the other day.----It was at an area like I have NEVER seen before as far as power lines etc.-----There was also a good size sub-station close by and I mean, there were large power lines ALL OVER this whole area, we were in (a large athletic field(s)/park complex).-------I wanted to do some testing for EMI interference with these detectors/coils.------Results was: No matter where I went in the whole area, the very worst interference I ever got was just a "wee" bit of static, nothing serious & you could easily pick out good target hits, a "no brainer".----Tests was done with both the 11" DD bi-axial coil & new 5X10" DD bi-axial coils used on both the GB Pro's & G2 & they were run at disc 40 (sometimes lower) and maxed sensitivity.------I've been around enough places & tested enough detectors, I can tell ya, those are EXCELLENT EMI results!------What great, amazing little detectors, I just like 'em more every time I take them out!------I find they are really doing excellent in relic & coin hunting---gotta get em out in the gold fields next.----------Del