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jessie.dazzle wrote:

Be sure to connect the chassis of only ONE audio component to the dedicated ground, allowing the other audio components to source ground via the interconnects.

I am very convinced that in Adrian case he has more than one path from his components to ground, the whole definition of “LOOP” suggest that it is NOT only via the PP2000 the system has ground reference. The fact that Adrian lifts ground on power amps and it changes hum only proves the point: in his amps the middle ground wire of the power cords apparently is connected to the amp chasses, which is how all committal amps are done. 

I hate that connection pattern even though it is the most secured from a perspective of faults.  In ALL my equipments I discount the middle ground wire of the power cords from chasses of my equipment where the chasses are connected to the negative terminals of my single-ended RCA connectors. So, my entire playback runs with grounds connected via negative terminals of RCA connectors and all RCAs lead my 11 input Placette preamp. The Placette connection deck acts as main negative bass terminal and the power cable from Placette to power source (would it be a wall of PP2000 or whatever)  is THE ONLY one my reference to ground. I might run Placette power to the power source with all 3 pins or lift ground on the Placette and use the grounding post (on the back of the Placette) connect it to my own custom ground. So far I concluded that to use PP2000’s ground (effectively the wall ground) is preferable for me (better imaging) then to use my own private ground.

Anyhow, what I important in this whoa story is that I have the only one element of my playback connected to ground. If I lift the ground on my Placette then my playback has no reverence to ground of any kind and I did run very successfully my playback for a while with 150V on playback’s ground.

http://www.goodsoundclub.com/Forums/ShowPost.aspx?PostID=6552

It is not what I advise to do but it is an indication that the while system of mine (19 components) is completely floating above any ground if it necessary. So, ground if from a main point is an assurance that it will not be any ground loops.

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