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In the Forum: Didital Things
In the Thread: Any good sounding AES/EBU interfaces out there?
Post Subject: My notes on adaptersPosted by George on: 9/27/2007
Here are my notes on adapters. I am not an engineer so I do not have further explanations readily available but could probably dig them out.

1) It is physically impossible to make an RCA male or female with an impedance of 75 Ohms, so all digital RCA terminated cables will never conform to the 75 Ohm S/PDIF spec. This can only be done with BNC. This I believe is why you cannot find the XLR to RCA transformer adapters.

2) Lavry says (you can find it on his website) that for short runs it does not matter whether you use AES or S/PDIF cables. He says just use the appropriate standard (non-transformer) adapters. Longer runs are a different story I believe.

You might just take your Synopsis cable, cut off the RCAs and stick XLRs on it. You might have to experiment with Pin 3 but thanks to your link the cables are cheap enough.

Here is a useful link from Rane:
http://www.rane.com/note149.html

George

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