Napisal/-a jozevolf » Ne Sep 25, 2005 9:46 am
Še en prepis. Sicer malo pozno ampak vseeno:
Another question which I continually get asked is – “do after-market specialty power cords sound better with Bryston power amplifiers?”
There is likely to be 50 miles of cable and half a dozen or more transformers between you and the power plant generating the power that your sound system uses. It is unlikely, to say the least, that a power cord occupying the final six feet of that 50 miles can do anything positive to change the conditions of that power.
In fact, it is possible to do damage to power delivery, by restricting current flow. For instance, that would be the case if you had a power cord that was too thin for the power requirements of your amplifier. If on the other hand the power cord was much larger than necessary it would unfortunately be limited by outside factors, such as the size of the wiring in your walls, or outside your house.
It is also possible for a power cord to incorporate bandwidth-limiting components, to restrict the influx of RF or other contaminants to the 60 Hz waveform. It is not possible, unfortunately, to do this without restricting the flow of 60 Hz current to some degree as well. Most audio products, especially including Bryston audio components, contain internal circuitry designed to eliminate these contaminants within the power supply. They are designed to operate from an unrestricted source of 60 Hz current, and will actually work less well if the current is restricted from the outside.
In sum, it is certainly possible for a six-foot power cord to have an affect on the sound. It is not possible, unfortunately, for this change to be an improvement, at least in connection with Bryston products.
Bryston recommends that our customers do careful listening prior to spending what is usually a very substantial amount of money on exotic power cords.
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