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 lvhjr1

This is a topic that gives me a flashbacks to circuits 101, 35 years ago. It was a difficult concept to grasp, even after completing 5 Calculus and 3 Physics courses, but let's simplify it into one expression, dynamic change. Any time you change the signal characteristics the sound will be different; that is the inherent nature of sound produced from electrical pulses. Digital cables are required to be Impedance matching at 75 ohms. There is no exact 75 ohm Impedance, since it changes with frequency and can be altered by materials and construction. The acceptance of the change is in the ear of the listener as to what sounds better. Coaxial cables will have more variation for interpretation.

In my opinion, optical cables should be a more stable pulse. However, most listeners feel that they are to brittle sounding. This is probably true unless you have a very smooth tuned DAC circuit converter. This leads us back to your personal taste as to what is more accurate. Comments are welcome.