Power cords - another interesting article

[murali]

This article may interest some (I have no affiliation to any cable manufacturer).

Cheers.
murali


Why Power Cords Make a Difference

 

[borg]

So the root cause is the noise generated by silicon diodes in rectifier, so using a low noise fast recovery diode or schottky diodes in place of the ordinary silicon rectifier diode should improve the performance as well

"A primary source of audible sonic degradation is caused by the power supplies in our audio/video components. Most components use FWBR (full wave bridge rectifier) power supplies that generate an incredible amount of transient noise when the rectifiers switch off. The design of a power cable can significantly affect the reactance of these signals within the power supply. The power cable is effectively part of the primary winding of the power transformer. The transition between the various metals used in a power cable and it's connectors can cause electromagnetic reflections and diode-like rectification of the noise impulses as they propagate away from the power supply. If the power cable presents a high impedance to these signals they will be reflected back into the power supply where they will inter modulate, thus increasing the high frequency noise levels of the component. Most power supply filters are ineffective at blocking very high frequency noise components and much of it is passed through to the DC rails. The sonic effects of this include: high background noise levels, blurred or slurred transients and a general lack of clarity and purity of the sound or visual image.