Originally Posted by maxruss
I use 2 different (and tested a dozen of) conditioners in my home. None is eliminating ground loop - a conditioner is just not meant to do so. Btw, none of the conditioners at any price range eliminate all 100% of dirt. The only way to cut on every possible interference is to use on-line regeneration (it will feel as if you have your own powerplant at home), which in turn may cut dynamics of sound.
I say that if a power conditioner did not help, that does not necessarily mean that power line is ok.
Also, Onkyo does not use grounding pin on the powercord, 3rd pin is missing inside Onkyo's IEC receptacle. On the other hand the outer box must accomodate some potential out of other appliance (CATv, DVD) via interconnects. It may also be that Onkyo gets this via aerial\\sattelite TV cable via interconnects between Onkyo and SAT\\Cable box.
Still it is a mistery why CBdicX could not show this strange noise behavior to Onkyo service and they declared the unit to be ok. Scientific approach dictates that if a defect is there, it must be wherever you turn the receiver on. It cannot be here 'faulty' and there - normal working condition.
Well, did the "power group" test but sorry to say no luck in getting the static noise out
I tried the power group from the bedrooms and also from the garden house, but all these groups also generate the static noise.
In addition to the static noise i have also a very low Hz hum and that hum will disapear when i disconect the cable box, so thats the hum source.
Even on PURE mode the hum will be there only on very high volume.
But the cable box is not the static noise source as this is the only input with NET/USB that will not have the static noise !
Strange is when i pull the HDMI cable from the cable box i do get the static noise on the cable box input, HDMI back in the Onkyo and the static noise is complete gone on the cable box source (and just this source)
I get the most static noise on the BD source.
On CBL/SAT with a connected HDMI cable nothing.
On NET/USB nothing.
On other sources yes, but on a lower volume then on BD.
Pulling HDMI cables makes no differents on other sources exept CBL/SAT as
I do have a bundle of 5 power sockets, 3 have continues power, 2 have power
from a Master/Slave unit thats on a timer, and connected to the M/S unit i have the Onkyo as Master and the Cable box and cooling fans as Slave.
Also tried without the M/S unit and that makes no differents to the static noise.
I do have on this power line various 12v adaptors, a monitor, various external PC divices and the PC itself.
So the Onkyo must get the static noise from somewhere in this line.
Think the only way to get to the source of the static noise is to start over from 0 and let the Onkyo and other music/picture devices get the power from one socket, without all the other stuff.
So its to work on the power line for me, or take it as it is...............