Connect cable modem/router to different circuit than audio?


I just got some reversed polarity outlets in my listening room fixed and have a much closer plug for my gear.
I cannot (yet) do a dedicated line. Up to today, my cable modem was plugged into this circuit. There is a way I could put that on a circuit  apart from my audio if it had the potential to add significant noise. Is that something to worry about or would it not matter much? FYI, my wife's office lights, computer, monitors are on this circuit and there are some light cans, too. Just wondering if the router/modem is an especially big source of noise into the circuit?

Thanks for any opinions.
128x128hilde45
 Dimmer lights and florescent would be the worst. Most here don't pay much attention to my advise but if you don't hear any difference I wouldn't worry about it. 
Sure djones51, I listen too, I'm just too lazy to do anything about it. ;-)

Regards
The router should not be on the same circuit as your audio.
A router with the coax line feeding it from outside generates high levels of RFI which translates into noise, an audible amount of noise.

Since you can’t isolate your audio from the electrical devices you mentioned, a power conditioner or power strip with filtering would be in order. Brick Wall or Surge X are very effective conditioners or a Furman Power Station will provide filtering from RFI/EMI noise on your shared AC line.

You have a very nice system, isolating it from the noise-generating electricals will provide noticeable benefits.


If you can't separate them, I suggest a Furman PST-8 as a good noise filter.  Put all your noisy devices on it.  Alternatively, you could get an iFi power supply for your router.
Thanks, all. I can easily put the router on a different circuit.

Presently, I have an Audience Adept 2R2p conditioner at the outlet (a Porter port) and in one of those plugs I put my DAC and the rest goes to a Wiremold power strip with a Shunyata Defender plugged into it.


If you can do it you should I moved my router closer to my system because I had too and it started creating noise in my system. As soon as I moved the router farther away the noise stopped. It’s a real issue anything you can do should help.
I assume you the cable router could go almost anywhere?  Is there a reason why it is at your audio equipment? All you need is an Ethernet cable run from wherever it is to your audio rack.

Ethernet is an electrically isolated connection. It is not perfect, some high frequency noise can get across, but whether that makes a difference or not would be a matter of your Streamer/DAC.  Listen to a silent passage, is there obvious noise? No?  Unlikely to be any issue.
@dletch The router is where it is for a number of reasons -- connections to phone lines, other wifi extenders, security system. I can at least plug it into a different electrical circuit. It broadcasts easily to my streamer OR I could attach an ethernet cable if I wanted. The issue here is about the electrical system.

You should move the router to a separate line. Although, it would be good if you could verify that this line isn't shared by your audio. You can shut off the breaker to confirm this. 

@lowrider57  Thanks. I woke up this morning and moved the router to a different line. Confirmed. Appreciate your help!
@ hilde45

where you having an issue before and that is why you decided to move things ?
@riley804  The issue was that my gear was not located near properly wired outlets and I had to run it off an extension cord.