I have tried seven or so different BNC to RCA adapters and hear obvious differences. Some are sold as 75 Ohm, yet no RCA connector can be. Black Cat Audio makes one specific to digital audio and it sounds best to me. So good, in fact, that I'll not reterminate my MIT Oracle MA-X. Pasternack sells one sounding nearly as good. It is 50 Ohm digital video standard, so go figure. Going RCA to BNC with adapters will likely be the same mixed bag.
