jeff: the reason the question is important lies in the stndardization of connections/ports for sacd data transmission. if one company , for example, chose to make a transport that used a proprietary connection (as accuphase has done), then that transport could not be used with other companies' dacs unless adapters were available for those dacs. having a more-or-less standardized interface allows consumers to mix and match different companies' components. the copy protection of the data streams "allowed" to be carried via firewire is, indeed, a separate issue. -cfb