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In Reply to: RE: what make coaxial cable impedances of 50 ohms and 75 ohms ? posted by Duster on January 16, 2017 at 20:01:35
Good question. I'd like to know why it should be so bad to use an analogue interconnect to carry a digital signal.
I'm using a balanced analogue interconnect between my Mark Levinson player and my DAC. Sounds good to me.
Can someone explain why it should be better to buy a new cable labelled "digital".
It depends of what make/model analog XLR interconnect cable it is. The established specification of a balanced AES/EBU XLR digital cable has a wide-range characteristic impedance, so perhaps the specs of your specific analog XLR interconnect cable falls somewhere between those extremes. The major difference between a typical analog XLR cable and an XLR digital cable is an AES/EBU digital cable tends to feature filler a.k.a spacer rods that act as a former for a twisted pair, in order for the conductors to have a more consistent and precise geometry from end to end. BTW, what's the length of the cable, and what make/model is it?
The analogue cable I'm using in place of a "proper" digital XLR AES/EBU is a basic Mogami Neglex 2534 microphone cable 2 m long. I have a parallel RCA S/PDIF digital cable from Signal Cables USA of 3 ft length. Can I tell the difference? Frankly there's so little in it.
I use the CDP so rarely now, I won't get a bespoke XLR digital cable right now. However I'll probably soon get a NAD Master Series M50.2 when they become available (cdp / ripper / server / streamer) which I will connect to my DAC (NAD M12) with a proper digital balanced cable.
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