Why do digital cables sound different?

Audioengr ( hi !! ),

What part do you think vswr and impedance mismatches between source, cable and load play when it comes to transferring signals from transport to DAC ? Since we are dealing with an RF based signal, transmission line theories DO directly apply here.

Your statements about low dielectric absorption intrigue me. Shouldn't a cable that has a higher velocity factor be less prone to signal deterioration / absorption due to the signal spending less time in the cable ? If that is correct, than a cable that is "slower", such as those that make use of a teflon dielectric configured in a standard coaxial design, would be a relatively poor performer. If that is the case, cheaper "foam" insulated cables "should" perform appr 13% better than more costly Teflon versions given equivalent conductor materials. Any thoughts or comments on this ? Sean
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Due to different configurations they act as tone controls. And I DOOOOO hear quite a difference in some. Most to me sound way too bright. Some interconnects produce quite a difference in the sound of a system. Price does not seem to me to be a big factor, rather finding one that shapes the sound to my ears preference. I rewired a system for a friend that thought he had good sound (very harsh). The results were jaw dropping even to him (Tin ears). His ears at least are better than Julian H. He cost me a lot of money buying on his recommendations. YIKES!!!!

Hi,

Digital cables can make a HUGE difference. But all those fancy multi-megabuck cables with exotic materials won't buy you much, unless they also solve the key technical problems. At high frequencies, these cables MUST be impedance matched. Ie ...Coax connections should be 75Ohm. If not, reflections inducing jitter related distortions will occur, and this IS what differentiates these cables. This along with dialectric absorption and inproper shielding. It is my feeling that cables that sound sharper, cleaner, more resolved, are simply reducing the jitter component compared to others. If your DAC reclocks than these differences are less apparant. If it does not, as my EVS doesnt, you will be blown away.

When I went from a rather expensive "fancy" cable to an RG6U(Quad Shielded 75Ohm) design cheapo cable(email me if your interested in what this was)...The differences were as big as the difference between various DACs...not insignificant. I love it when something cheap does the same job of something much more expensive, and sometimes better.

Good luck

Jt, rather than clog up your inbox and have to make several individual replies, how about posting your comments here ? I for one would like to know what you have gotten such good results with, especially since both I and my Brother along with several others here are running EVS DAC's.

Before you comment, you should be aware that there is NO such thing as a 75 ohm RCA connection. This is true regardless of what Canare states. Nor is the nominal impedance of the wiring from the digital input to the circuit board inside the EVS 75 ohms. None the less, you may have stumbled onto something in terms of increased power transfer / minimized loss / reduced standing waves. The last part ( reduced standing waves ) is directly related to a reduction in jitter. Sean
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Zilla - it is impossible for a digital cable to act as a "tone control". What happens is that the jitter caused by the cable losses results in frequency modulation of the analog signal. This can cause lack of clarity and focus. In general, the better clarity and focus, the better the digital cable.