Why do digital cables sound different?


I have been talking to a few e-mail buddies and have a question that isn't being satisfactorily answered this far. So...I'm asking the experts on the forum to pitch in. This has probably been asked before but I can't find any references for it. Can someone explain why one DIGITAL cable (coaxial, BNC, etc.) can sound different than another? There are also similar claims for Toslink. In my mind, we're just trying to move bits from one place to another. Doesn't the digital stream get reconstituted and re-clocked on the receiving end anyway? Please enlighten me and maybe send along some URLs for my edification. Thanks, Dan
danielho

Showing 1 response by jt25741

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