Quote:
Originally Posted by MartinV
Yesterday we tested with serveral powercables.
We had non shielded and shielded cables.
We found-out that non shielded cables gives the best result with the luxman l509x.
A better soundstage and a better controlled bass.
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I have tried a few on my Luxman 590 as usual. Did not find anything of significant or a meaningful enough (to my ears) difference to be worth while.
Some manufacturers specifically advise against power cords other than the included cord. Sometimes shielding can help but in most cases it is unlikely.
I'll just copy/paste this.
Power Cord Shielding
Shielding a power cable is unadvisable. It will add significant capacitance to the cable with minimal positive benefit. If you really need this, then the shield needs to be spaced well away from the conductors (large diameter) to minimize capacitance and avoid constraining the magnetic field lines that should couple between the conductors.
Empirical testing has shown that standard shielded 14 gauge stranded power cord sounds less dynamic than unshielded 14 gauge stranded cord when used with audio components that benefit from improved cords.
The impedance of the AC electrical system is extremely low and susceptibility to magnetic and RF fields is extremely low for power cables so the benefit is questionable at best.
Unfortunately, some of the commercially available shielded cords appear to make some systems sound better, but are actually "tone controls" for taming badly matched or designed components.
There is some benefit to shielding if you are trying to protect unshielded nearby unshielded interconnects from the fields generated by the cord itself.