Speaker Hum

@jdm11

It also might help us diagnose the problem if you gave us a few more details, like:

-equipment connected via RCA or XLR or both?

-how many pieces of audio equipment have 3 prong AC plugs, how many have 2 prong AC plugs?

-how long your RCA cable runs are?

-generally speaking (or you can get specific) how many and what pieces of audio equipment are interconnected?

-is all audio equipment in the same room?

Those are right off the top of my head.

If your speakers have powered subs, could you be having a ground loop problem? You have a cord for the amp and each speaker. So that’s 3 plus a source. Do you have a power filter or gang outlet on an extension cord so you could try all 3 on one outlet ? Also the Chester plug is a good idea too. Regards , Mike B. 

Thanks for all the input everyone I appreciate it there's a lot to look into here. In terms of the specifics they are: 

- All equipment is on one wall. 

- On the video side I have a single wall (not gang) outlet and am using a 6 outlet surge protector power bar plugged into that. That bar has hdtv, roku, cable box, modem and 4k blu ray player plugged in. 

- The audio side and video side are about twelve feet apart.

- On the audio side I have another single wall (not gang) outlet and am using a 6 outlet surge protector power cord plugged into that. That bar has:

1) Rega Planar 3

2) Rega Phono MMK M3

3) HiFi Rose 250 Streamer

4) Marantz SACD 30N

5) PrimaLuna EVO 300 Integrated (stock tubes haven't been touched)

- The speakers may be a bit of a wrinkle here. The speakers are Goldenear Triton OneR's with powered subs. I'm running each sub directly to the second wall outlet receptacle. Due to distance I have to plug one in on the audio side and one in on the video side.

- So on the two wall outlets (twelve feet apart) one single wall outlet has all of the video components on a power bar plugged into outlet one and a speaker plugged into outlet two. The other single wall outlet has all of the audio components on a power bar plugged into outlet one and a speaker plugged into outlet two.

- Just to try something I unplugged everything except for the amp and the speakers. Then I plugged the amp into an extension cord and plugged it into about ten different outlets throughout three rooms. Hum stayed exactly the same.

- The amp, speakers, marantz and streamer are 3 pronged. Everything else is 2 pronged I believe.

@jdm11 

So since the EVO 300 has all RCA ins and outs, I'm assuming all equipment is connected via RCA cables. Correct? 

Disconnect the internet/tv cable from the cable box or/and modem.

Still waiting to hear from you if this made a difference. To be clear, disconnect the coax cable from the cable company, so it makes no connection to your modem or cable box. 

Looking on the back of the OneR's, I can't tell if there's 3 prongs in the AC socket or just two? I think it's two, but please correct me if I'm wrong.

Is it safe to assume the OneR's still reproduce sound if they aren't powered (ie, plugged into an outlet)? I understand the sub sections of them will not work, but does the rest of the speaker system work? If they still reproduce audio without the subs functioning, is the hum still there? Also, just try unplugging power to one of them, and see if that changes anything.