Got the standard Koss-UR30 headphones. It must be my little head or something because they won't stay on my head when digging (setting down unit pulls headphones off). Seems as though I have to take them off and then to put them on again when probing (sunray). I have been using Ratphones for my MXT. Finding the blocking of the ambient noise helps alot in deciphering low signals, and the crispness of the tones are a must. Is there a comparable set of headphones for the Explorer II (the rats don't work/plug configuration). Thanks in advance. HH RD