Is a Bridge II sonically (still) preferred over USB when the connections are galvanically separated from the source? That is, the cable connecting source to the Directstream DAC is not copper (or any other metal) so that electrical noise from the source cannot reach the DAC.
Seems with copper-based connections the Bridge II (data packets) is sonically preferred to USB (music stream) reading various posts comparing the two. One issue with USB is computer noise penetrating the DAC via the +5V and data lines (besides the USB cable acting as an antenna to some degree pending cable isolation). Both connections can be implemented with galvanic separation to block electrical noise from the source. For USB an option is Intona High Speed USB Isolator which isolates +5V and data lines. For the Bridge II one could implement a fiber optic cable to relay the data packets from source to DAC. Both solutions are highly praised but my question is does the Bridge II still hold sonic advantages over USB once source noise has been taken out of the equation?