Signs of poor electricity in home...?

Ok folks I know pretty much that all homes have crappy power for electronic gear. However my dilemna is that I have continued to have a buzz type sound come from my spkrs whenever amp is powered on. This is the same case with three different amps and a recvr. I just completely disconnected everything and have all the gear everywhere in the living room. This was no small task.
Nht Controller
Nht Power 5
Nht Power 2
Oppo 83
Toshi HDDvd
AudioControl Bijou EQ
Panamax 5500ex
Nht A1 x 2 for bi-amping mains.
Nht X2

I use Signal pwr cables and my own custom made.
Signal, Bluejeans, monster ic's
PS Audio powerport

I have eliminated any cable combo as the culprit and have it narrowed down to the fact that with an amp plugged in, powered on, and just spkr cable connected to a spkr I get this slight buzz/hiss type noise. I mean nothing connectected to amp but what I said...electricity...and spkr cable direct to spkr. It is not the hmmmmmmmm of's a hiss like white noise makes when a tv channel would sign off-air if you are old enough to know what I mean.'s bugging me to pieces. I have went to the breaker box in garage and eliminated it being the fridge in neighboring room, etc. Even with the Panamax it still gets noise to the spkrs mid/twtr...mainly mid. Volume has little or no effect on it if you are wondering.

So????? Dirty house power and what do I do. Would having a seperate/dedicated line help? I don't have dimmer lamps or any other of the typical buggers in the ac chain. No tv either as I have a Pj setup which plugs in where I use to have a ceiling fan and installed box/receptacle to pwr it.

I don't hear it if source is playing but sitting idle all 5 spkrs doing this is annoying. Suggestions please.
I would install an eight foot copper ground rod. Attach it with lightening ground wire and clamp to your main breaker box. This can be bought at Lowes or Home Depot for less than $50.00 bucks. Having a good earth ground helped me with a noise problem at my old home. I installed one when I moved into my current home. It is real easy just use a garden hose to soften the soil as you drive the rod into the ground. When you get the rod low you switch to a sledge hammer to finish.
Coxhaus...I'm thinking about what you suggest and it reminded me that the direct tv gnd lead from the dish/cables tie in to the main somehow outside near main breaker box and my ac repairman showed me it contains a main switch/brkr from the street and two for the compressor and one for blower unit.

Explain a bit more if you would please what you mean by clamp to main brkr box...? Clamp to what part...there is 220v in that booger somewhere...yikes. Thanks.
DC current can ride along on your ac lines and cause noise in the system. I had that problem. Channel islands audio makes an outlet that can eliminate this problem.
I normally use an AVR for all my audio gear, i usually hear noises when there's low voltage.
I have a psa harvester on the way...we'll see if that helps. Accorcing to my Panamax which shows both volts and amperes the voltage is usually about 122-124 and amperes are 1.1-1.5 when rig is being used.

I have pwr co coming out later in the week...maybe something will be found...maybe not.