System hum after connecting A500s & using Xtension cord
I got the infamous buzzing/hum in my system after connecting 2 Behringer A500s. So I figured they had to be the culprit. I began reading the Audioholics tips section on this subject and it hit me. In a rush to connect the amps to my system, I used an extension cord to temporarily plug in one of the amps and after reading the article it dawned on me. I unplugged the amp from the extension cord and the buzzing was all gone. So if anyone is using an extension cord this could be the problem.
Clint I don't recall if this (extension cords usage) is part of the ground loop article but maybe you'd like to add to it by stating "Do not use Extension Cords" or have folds check sources connected via extension cords when experiencing buzzing in the system.
7.1 Surround system consist of the following:
Mitsubishi 62" DLP (WD-62725)
AVR - Denon 3805
Behringer A500s (Bridged for Fronts/Center channels)
Towers - Polk RTi10s
Center Channel - Polk CSI-5
Surrounds - Polk FXi-30s (side and rear)
Sub - Polk PSW505
CD Player - Denon DCM-280
DVD - Denon 2910
VCR - Panasonic
DTV H10 Receiver