Buzzing Speaker Cable

[Bellringer]

In my home studio, I have electrical buzz coming thru my monitors. I have troubleshot everything and upgraded to some short Monster Cables but still get noticeable electric buzz in 1 of the speakers. If I touch the cable it reduces about 95% (so I'm grounding it I guess). So what do ya think I'm dealing with? 1 bad cable, a grounding problem with the speaker, anything else?
I can live with it, but it would be great if I didn't have to.

[smopo24]

you may be keeping your monitors too close to some magnetic feilds (like your computer screen, television, or microwave). try putting them somewhere else to see if the noise goes away.

[Nubus]

Shut off and disconnect your mixer so that the only thing on is the power amp and leave the speakers connected. If the noise is there now you can try to connect a wire from the chassis of the amp to the screw on the wall power soccet. That should divert the noise to the ground.
If the noise is not there connect and turn on your mixer. Does the noise come back?

[Bellringer]

For a little more information. I'm just using a Roland VS2400, a monitor (that is far from the problem speaker), and 2 Active Event TR8's. I do need to check out what is plugged into the same power supply and maybe swap speakers and cables to see if it is consistant.

[Nubus]

Well first try the test where you turn on the powered speakers and don't connect any gear to them. If the noise is there without any cables connected to the powered monitors then you should try and run that second ground wire. It has worked for me!

[dagosto]

Yes, I have done this second wire trick myself. I simply took some raw copper wire and connected it to a screw on the head. I used gaffers tape to run this cable along side the amps power cable and would either tape it or screw it to the power outlet. It worked well and was easy this way.

[Nubus]

This just popped in my head. Did you try and make a cable where the shield has been disconnected at the Event TR8 end of things, but still connected on the VS2400 side? Or the other way around?

*edited backwards wording!