Everything is plugged into a Torus RM20. I don't use a laptop. My 2-channel is quiet as a mouse. The noise only occurs when I'm using HT.
Eliminating Ground Loop Problem
I use a Marantz 7702 MKII processor, ATI 3-channel amplifier to drive my center and rear channels, and my Jeff Rowland Corus preamp with HT bypass when watching movies. I'm using RCA interconnect cables from the Marantz to the ATI, tried balanced XLR cables with no change. I contacted Marantz and they didn't provide any advice. ATI helped me troubleshoot the issue and we isolated the problem to the Marantz. Any advice on how to eliminate the ground loop issue?
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Ok I’m serious now.. I got a feeling If I routed that bunch of cables and inspected the connection including grounds between components, a LOT of the noise would go away if not all of it. A crap cable can drive YOU nuts too. NOT ME though.. I won't stop until my system is quiet.. At least 10 times I’ve fixed system that supposed PROS didn’t fix because of routing.. You know the Stereo Only, kind of free install they get with a 20K purchase.. LOL.. They leave and you can hear arcing in the back ground.. as you tip them for their BAD work.. BUT you think it’s wonderful.. Can’t find the cat, see his tail sticking out from under one of your new 10k 200 lb speakers.. Still purring.. If the noise is that bothersome, it has to be routing at least partially.. I’m telling you you can stand by my speakers and turn the system up all the way, you have to be within 12" to hear anything.. I can hear valves hiss, ever so slightly.. My kids can’t hear it at all.. Grandson and wife can though. A lot of valves, too.. Regards |
Look into ground loop isolators and decide if you need them. It may not be your gear itself. This might solve the problem: https://emfessentials.com/products/pure-power-plug-in-filter-120v If all else fails, an electrician would be able to determine a solution for clean electricity throughout your home. This would mean installing a mains filter to regulate electricity - keeping those sine waves linear and without high-frequency switching noises from plugged-in devices. Audio gear is especially sensitive to dips in voltage and dirty electricity. Sometimes, radio frequencies through an outlet can manifest as hum. I'm sure you will figure it out... |
Thanks to everyone for their input, I really do appreciate it. A special thanks to Fuzztone for mentioning cable TV. I removed my cable box and connected a ROKU stick to my OPPO. Removing the cable box eliminate 99% of the noise to the point that I can only hear noise if I put my ear to the speakers. In addition, I changed from using RCA to XLR cables. |
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