It would seem that they are the best kept secrets in the iem world as they don't get a lot of props on head fi. Good for you that you discovered them . The work they did with Capitol records staff has payed off in the 18 which seems like the uerr but with more bass . . The rep maintains they have the flattest response of the whole line. Super hi Tec fitting for ciem's with 3D printing . Mine were perfect first time. I doubt the 64 could outdo them from the listining I did at canjam. Great company ,great product . What other iems did you listen to . Any thing come close to the resolution from the 18's or are they in a class by themselves in your opinion?