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Kim, perhaps you wouldn't mind telling me (private mail?) if cables for DC currents (the audio signals are in fact basically DC currents from an HF/RF point of view) have a direction, and why. I have in fact heard stories about cables which have a direction (these cables are for some obscure reason called "isolators"), but the physical effect in question responsible for this does not apply for DC or LF - in fact, the cables I've seen with this property couldn't even be used to carry a DC current. So, please, please, enlighten me - I swear I will not tell anyone from this list! Rainer Rainer Straschill Engineering Consultant HF semiconductor technology, HF simulations > you guys are cracking me up. > > the funniest ones are those who think they know what they > are talking > about > and try to talk authoritatively about it. Such great > imaginations! It is > always such fun to listen in on people discussing your > field of expertise. > > it happens the job i do in real life is called "signal integrity > engineering" where I actually get paid reasonably well to > know things > about > how to get electrical signals from point A to point B. In > my case the > frequencies are much higher than audio, but the laws of > physics are the > same. So I actually do know if cables can have direction or > not, and why. > > But I'm not going to tell you. If I did I would miss out on > some of these > really funny theories!