Ron.M -> RE: Home Stereo Question (Dec. 29 2006 20:34:48)
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Ramin, It sounds like classic "ground loop" problem. Basically it's caused by the fact that your computer's audio ground is the same as the power ground.. (ie connected to the metal case). Your stereo also has the same setup. (ie the audio ground is the same as the power, or case ground) Now, your audio ground is connected to your stereo via the outer braid of your audio cable....but it's ALSO connected via the ground pin on both pieces of equipment! So you have a dual ground path. You can change all the leads you want, but the problem will still remain. To cure it BOTH pieces of equipment need to be at the same ground potential. This involves removing the ground connection from one or the other and connecting the cases of both pieces of equipment with a piece of wire. Usually audio is grounded at the output amplifier stage, so that would mean removing the ground connection of the computer, so that both pieces of equipment are grounded at the same point. NOW TAKE HEED! It is not considered wise to remove ground connections from grounded (3 wire) equipment because of potential shock hazard. The "proper" way of doing it would be to spend a few hundred dollars on optically isolated or at least "balanced" (3-wire X connector) audio peripherals. Anyway, you guys only use 110 Volts over there or something? That's just a tickle... not a proper shock...[:D] Here in Europe it's 240 Volts. No wimpy stuff here...proper lethal electricity! A proper "man size" macho voltage for "Real" men. [:D][:D] cheers Ron
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