Just a quick question, Is the TV connected to cable TV?
I have had all shorts of problems with the cable ground being at a different potential then the house ground.

I'm debating buying an AV7005 for myself, but don't want to if there are ground loop issues.

I have DirecTv, with multiple DVRs.

The AV7005 has received rave reviews. I believe it is a very nice product. Just my 2 cents, the internal circuitry may not be as good as other brands (hence my problems). Some others report the same issue.

Depending on your set up, you may love it. Most places offer free shipping with a return policy. Right now at just over a grand, its a great buy.

Scott and Jim at Outlaw have been wonderful to work with, and I wold highly suggest you buy here if you are thinking of getting one.

Have you disconnected the Directv cable for your testing? As far as I can tell mine does not have a ground other than the chassis ground through the plug and that is much different than the house ground circuit.

I did disconnect it when it enters the house. Within a few feet of the 4 cables entering the basement, it is conected to a grounding bloc. From there, the 4 cables go to a 4x8 multiswitch, and there is a nice thick wire that goes to a grounding block connected to a cold water pipe about 6 feet away.

So if you take the outputs of the AV7005 and put it into the 7.1 inputs of the SR would you get buzzing?

Does the SR have Pre-outs that you could hook into the Outlaw amp? That would also give you another data point.

Disconnect the DTV cable right at the receiver in case the circuit is the problem.

I could try that. I can do it tomorrow.

I think I tried that already, it did not help.

Dear cp1966,

I have been actively following this thread because I am experiencing a nearly identical issue (HDMI induced buzz), except that it is occurring with my Model 7900. I waited until now to respond because I didn't want to interfere with the troubleshooting of your issue. Bottom line: after conducting a nearly identical troubleshooting procedure as you, I will be returning the amp. Briefly, I have a Denon AVR3808-ci receiver (RCA preouts only), 3 sources all of which are connected by HDMI (65" Panasonic Plasma, Denon Blu-ray, and a Motorola DVR). Just like your situation, the buzz is caused by HDMI cables. With everything hooked up, the buzz is so loud that it is audible 15 feet away. When I remove the HDMI out to the plasma TV, the buzz decreases 50%, and when I remove the HDMI in from the DVR, the buzz stops entirely. Like you, I have swapped out cables, used cheater plugs, removed my Panamax conditioner, etc., but nothing stops the buzz (other than removing the aforementioned HDMI cables). However, again like you, when I take the Outlaw out of the picture and hook everything to my AVR, pindrop silence! Similarly, and even more telling, when I use my Emotiva XPA-5 as the amp, it too is pindrop silent using the same connections.

Given our nearly identical issues, I conclude that the giant transformers in these amps are effectively antennas that attract unwanted frequencies. Our situations are not consistent with a ground issue.

I am very disappointed that I have to return the amp, because it is simply amazing. Even at very low listening levels, 50 db below reference, the bass is significantly tighter than my Emotiva and the midrange is also much more clear. I can't even imagine the sonic improvement at levels approaching reference.

Good luck with your issues, and if you would like to chat further offline, let me know.

Amaheshw,

Very sorry to hear your situation. It sucks, doesnt it? Its a shame we can put a man on the moon but cant nmake a pre amp and amp work together in peaceful harmony!

I am waiting for a call back from Jim (I called Monday and left a message) to get a RMA. In th emeantime, I am considering wiring a new circuit to feed the amp and another to feed the TV to see if ican get this to work. I wanted to try running the SR to the AV to the amp to see if that worked as suggested earlier, but didnt have the time today.

I swear I have tried so many diifferent configs in my system.....

Anyways, I really do appreciate everyone chipping in and helping out. I do wish to keep the AV7005 and my amp. But if I have to settle, the SR7005 is a very nice piece.