DIY powercords

[Blu-Raider]

Okay -- I'm a degreed electrical engineer with 27 years of power and grounding experience. (PE in several states) If that lends any creedence to my opinion, so be it.

Improper grounding or poor shielding in a power cord can lead to the dreaded "hum" in any audio component. A lot of high-end equipment has a separate grounding post to eliminate this possibility. Long runs of cable may require shielded cable to prevent picking up noise. Usually with proper grounding in a power cable, this isn't an issue.

In other words -- in my opinion the cables supplied with your audio equipment are perfectly fine. If you hear a "hum", your system is incorrectly grounded.