are not really 75-Ohms matched (the wire itself it is, connectors aren’t), thus the connection is not perfectly matched. This leads to signal reflections
which, in turn, cause ringing and jitter.
Q: I own a DAC with RCA S/PDIF input: does it make sense to try to use a BNC hiFace anyway?
A: In this case a slight improvement over the RCA hiFace can be obtained, provided a mixed termination interconnect (RCA on one side and BNC on
the other side) is used.
Q: I own DAC with RCA (BNC) input, a BNC (RCA) hiFace and an RCA-terminated interconnect: may I use an RCA-BNC adaptor to connect the
two devices?
A: It is possible but not advisable: adaptors are generally poor quality toys. Best is to mod the interconnect by replacing one RCA connector with a 75
Ohms BNC one.
Q: Is it possible to use the hiFace to send digital audio data from a CD player or other digital source to a computer?
A: No, as the hiFace is an output-only device. The inverse feature is provided by the S/PDIF input in the Joplin ADC.
Q: Is it possible to use an USB extender to connect the hiFace to a computer?
A: Yes, provided the extender is no longer than 2-3m and it is compliant to USB 2,0. With longer extenders operation is not guaranteed.
Q: Is it possible to use an active USB extender to connect the hiFace to a computer?
A: Yes, provided it is USB 2.0 compliant. Anyway, the operation success also depends on the specific tool used and is not guaranteed “a priori”.
Q: IS it possible to connect the hiFace to a USB hub?
A: Yes, provided it is USB 2.0 compliant. Anyway, the operation success also depends on the specific tool used and is not guaranteed “a priori”.
Q: How long a cable can the hiFace drive?
A: It depends on the cable, we know of successful connections on 8m long cables.
Q: Is it convenient to power the hiFace with a separate power supply for USB devices?
A: Yes, but the hiFace correct operation is not guaranteed, so a check before purchasing the power supply is strongly suggested.
Q: May I connect the hiFace directly to the analog input of my preamp?
A: No, you need to use a DAC, or you may connect the hiFace to a digital input of an audio/video receiver/decoder.
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