Update. Finally tied everything in. New PJ mounted, almost all the buzzing gone, working on the last buzz in the rear speaker. Ran my new monoprice HDMI 60 foot redmere cable. Start it all up, loud buzz back again. I pull the 60 foot HDMI out of the PJ, noise gone. I knew this might happen as I ran the HDMI (no choice) next to a ton a wiring. It must be picking up the noise from that.

UGH. Looking now at ways to move it, shield it or add something to stop the buzzing. Some ferrite cores to add, one on each end of the HDMI cable. Not sure if this will work.

Looking at ways to run the cable away from the electric lines, lights etc. It also passes the houses ground wire from the panel to the cold water pipe.

Anyone have any suggestions? Thanks.

Wow, that's a long HDMI run, you must have a very large room. If you were to run the cable in a metal pipe, what electricians call EMT, this would shield it, though it's probably not an option to install such piping. Another point is that if the HDMI cable crosses any wiring it should do so at a 90 degree angle.

Other than that, I wonder if a better cable might help. I bought a 35 ft length from Blue Jeans, though I don't know if they even recommend such a long HDMI.

A 60 foot run is bound to give you some issues. I think it is written in the HDMI law somewhere. Can you shorten the run? Get the cable at least a foot away from any power cables.

I also think pro installers use component video cabling for that long of a run; supposedly, nothing is lost in video display (don't know about 3D), i.e., component can do 1080p....

60 foot run does exceed the HDMI spec for maximum supported length (that limit is 15 meters, borrowed from the DVI spec that was meant for monitors plugged into desktop PCs). Component was used by installers for a long time because they knew how it worked and it was better behaved over long runs, but it won't do 1080p or 3D - plus it is being phased out of newer BD players (including the BDP-103 and BDP-105) - so I think even they have moved to HDMI now. I know some recent AV installs on college campus jobsites have been using HDMI. Besides, if the HDMI cable is having troubles with interference from power wiring, component will probably be even worse in that regard. The idea of adjusting the route to get away from or perpendicular to power wiring is probably the first priority.

Welcome back Gonk!! Glad to hear from you. Must be busy as hedoublehockeysticks.

Thanks guys, also posted on the AVS forum and here is what someone had said;

Assuming you are talking about the Redmere HDMI cable, that can't add noise as you describe to your system. Let me explain...

A group loop hum on a speaker would be 60Hz audio. That happens when the AC frequencies bleed into the audio. Other hum frequencies have similar beginnings.

The HDMI signal does not contain any analog audio. It is only digital. So, for the power line to cause an audible hum in the HDMI line, the AC interference would have to find the part of the HDMI bitstream that had the audio information, convert itself to digital, sum the newly created digital information with the bits that were already there, modify the encoding scheme so HDCP would pass and then repeat the process continuously. Obviously, this isn't going to happen and random bit errors do not produce a continuous hum (or even a hum).

However, I can give you a possible explanation. It is possible that by connecting up the HDMI cable, you've re-created a ground loop particularly if the ground is not the same where the Epson is plugged in versus the Marantz. To see if this is true, run a long AC cord from the Epson and plug it into the same AC socket as the Marantz. If the hum disappears then that is a likely explaination. Unfortunately, that would also mean that any HDMI cable would do the same thing.

A second possibility is that your speaker wire is now close to an AC transformer of some type and that is feeding back into the Marantz.

See what happens if you now remove the transformer that you just added. Unfortunately, these ground loops turn into science fair projects very quickly since they are hard to pin-down.

And he was RIGHT!!! Ran an extension cord over from the PJ to my power center which everything goes into, no more noise!!!

Sound is now perfect, picture is now perfect. I am going to make it more permanent. Not sure if I should make an extension cord out of romax or SJ cord, it will be approx. a 60 foot 120 volt run. RedMere Cable passes signal perfect including in 3D.

Sounds like a win. Just make sure you have enough ampacity on the circuit your are plugging the PJ into because they do draw some power.

Hey again guys,

Now this is what is going on!!!!

I have an XBox 360, Samsung cable box, PS3, Nintendo WII, Sony ES CD player, Oppo 103, Outlaw Audio 7700 amp, Toshiba 50 inch DLP TV, Epson 5020 and a Marantz AV7005 all running into 2 Panamax 5300's. The 3 new components are the Epson PJ, Oppo 103 and Marantz 7005 which I nstalled a few months ago. They replaced a panny PJ, Pioneer BDP51 and Outllaw 990 Pre. With the old system I never had anything more then a slight hum. Right before I added in the new components, the system started to hum louder. I didn't do anything about it as I knew I was changing some of the pieces so I would deal with it then, nothing new was done to the house.

I installed all the new equipment, all new cables, turned it on and the dam hum was still there. I pulled the cablebox in wire, hum gone. Purchased a Jennson transformer isolater, installed, hum gone. Great!! Next time i turned it one, hum came back, equal in all speakers, volume does not effect it, steady buzz. I started pulling wires trying to isolate it. When I pulled the PJ HDMI, buzz stopped. Someone on this forum asked me if the PJ was plugged into the Pannamax, it was not as it is on the other side of the room. I ran a cord over from the PJ to the Panamax and the hum stopped again. I then ran SJ cord 14/3 from the PJ to the Panamax, turned everything on, hum was back, this time in only the rear right speaker. I am running a 5.2 set up.

I pulled all the cables etc and couldn't find what was making the buzz. I switched the wire from one speaker to the other, the buzz followed, it was in that wire. At this point I was so pissed off I decided to run a dedicated 20 amp circuit from my panel to my componenets. Using 12-3 i ran the circuit with an isolated ground and used that type of recepticle. Plugged everything into that circuit, still buzzes from the rear right speaker.

I was playing around with the back of the Marantz 7005, I pulled out HDMI 2 cable which runs to the Toshiba TV, buzz still there, when I went to put it back in, I was off a little and the HDMI end was tapping the back of the 70005, I heard static and all of a sudden, bam, the buzz went quiet. I plugged back in the HDMI cable to HDMI out and the buzz was still gone. I shut down, turned it back on, buzz back, still out of the rear right surround speaker.

Again, I tap the cable to the back ot the Marantz, some static and the buzz goes quiet again. WTF!!! If the HDMI cable taps a back screw on the Marantz, the buzz stops also. Almost like a capacitor is discharging.

What is going one, can someone please help me on this one, I am at a loss here. Brand new 20 amp circuit, isolated ground, nothing on the line but my home theater, back right speaker buzzing kind of loud, then tap HDMI out 2 from Marantz, static then quiet???

I tried it with HDMI 1 out of the Marantz and nothing. This is the one to the PJ which is a Monoprice 60 foot Redmere cable. It is the only Redmere cable I am using.

Sorry post is so long, I tried to keep it as short as I could.

Thanks!!!!

Brian