2. home-theater
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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 60hz...it'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. Anywho...it'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.
mnnc
thegoldenear's avatar
thegoldenear
121 posts
 
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03-14-08, 12:16 AM vulture
coxhaus
231 posts
 
There is a ground bar or spot in your breaker panel to connect your earth ground. If you do not understand please do not experiment. There is very high voltage in the breaker box which can kill you. Maybe if you get your bar in the ground which is the hard part you can get the power company to connect the ground strap to your breaker box. Slip the guy a twenty. Once you get a good earth ground things will be quieter.
mnnc OP
175 posts
 
Goldenear...you mean iec adaptor? Why would I need that? All my gear is standard iec except the hddvd player which is unplugged/not used right now and it's a 8 shaped female plug I think called an A7 type. Anywho, doesn't matter as it's not being used.
thegoldenear's avatar
thegoldenear
121 posts
 
The fella in the post did the following.

I did some more investigating and there appears to be a grounding problem. If I use a power cord that does not ground the NHT to mains I get no noise (the amp comes with a cord that grounds it).The NHT is the only component in my rack that actually has the grounding pin in the IEC socket.

There might be some funky wiring inside the NHT, I even looked at the wiring diagrams for the icepower modules at http://www.icepower.bang-olufsen.com...000aspdata.pdf. It looks like they all have balanced inputs by design so the NHT must be wired with the Vi- and analog ground shorted. In any case I would be interested to see if this is just a problem with my unit or if I am doing something wrong. In any case this is the first power amp that has done this in my rack and I have had quite a few.
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