60 Hz Noise Reduction

I'm assuming that if I connect the chassis to AC ground instead of earth ground it would cause the same EMI/RFI noise problem. or worse correct?
03-15-10: Aweaver555

Equipment safety ground, ("U" shaped hole ground contact on the AC wall receptacle), is often referred to as earth ground. I assume that is where you connected the ground wire from the Denon chassis to earth ground.

TiVo/Cable Loop
The Cable TV, and TiVo coaxial are not connected to the Denon unit. 03-15-10: Aweaver555

How about the audio-out from the TiVo? I assume you have interconnects,ICs, that connect CATV audio to the H/T audio system. The ICs complete the ground loop circuit from the CATV coax grounded shield through the audio equipment and out the equipment grounding conductor of the Acurus A200 to the equipment grounding conductor of the AC wall receptacle.
Jim

Hi Jim,
Well I don't believe it, but I disconnected the house cable line, and the noise went away. This line goes to a 4way splitter which supplies the TV, TiVo, and VCR/DVD.
I believe the splitter has a DC pass through.
I reconnected the house cable with none of the devices connected, and then reconnected seperately to determine which device was the source. Unfortunately when any single device is connected the noise returns.

When I do any of the following the hum goes away.
1-AC ground video splitter.
2-House cable through Panamax coax Isolation line.
3-AC ground denon chassis. (not a good solution)
4-drive front speakers with denon only.
For items 1 thru 3 there is a very very low level high frequency noise almost impossible to hear.
I'm wondering are items 1 & 2 good solutions, and what should I do about the residual noise?

Please note the TiVo, Wii, Playstation, and xbox go to a Philips AV switch that outputs to a 720 upconverter, which than supplies an hdmi signal to the TV. The TV supplies a digital audio to the denon reciever. Not sure if that helps.

Thanks Again
Aaron

I reconnected the house cable with none of the devices connected, and then reconnected seperately to determine which device was the source. Unfortunately when any single device is connected the noise returns.

When you get the Jensen iso transformer install it between the main CATV coax and the "line in" of the splitter . That should solve your problem.

For a temporary fix you could use a ground cheater on the power plug of the Acurus A200.
Jim
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60zHz hum is always caused by either induction or a ground loop.  If proper grounding resolves the issue, then there is no risk of introducing noise because there is no voltage differential. (See differential op-amp). An isolation transformer mitigates the problem  breaking / floating one ground loop, but the system, still not properly grounded, is still susceptible to other ground-related ills.