Recently I compared coils using my Explorer SE, (Coils used were SunRay X-5, SunRay X-8, Detech 10x5" WSS SEF) in a forest with colonial period relics. The Detech was most stable in manual sensitivity. The X-5 next. The X-8, (pre-owned) sounded off when slightly bumped, regardless of sensitivity level. The hot rocks here can get annoying, hitting steady 2 clicks below silver quarter. My etrac handles Hot rocks no problem. List your favored coil for your Explorer. I swing my Detech 10X5" WSS SEF the most.