He can not afford much and since i bought his detector for him and it comes with a built in speaker I told him he has to buy his own head phones. I also bought his tools and some books etc..... If he gets a phono jack adapater would the in ear style ones from Sony work well? Even I am going to be useing some SOny head phones but with a head band. My Sony's have ear seals and produce absolutely beautiful sound. Is their any advantage to useing the ones sold by the big detector companies?