ok as promised!! i bought a nox 600 and a set of GG ndt phones! along with the minelab waterproof adapter! the GG's wouldnt work using that adapter but all my other 1/4 in plug phones did! i took some advice and purchased a stereo to mono adapter and this actually worked! the radio shack part # is 2740071. its a 4 pack of adapters for around $8 but the one you want is in there!! i'm a happy camper now so where's the gold!! haha