need AC outlet hum filter

[gychang]

I have several AC outlets in my music room. I also have 2 amps-speaker combos and found out now that only one AC outlet is hum free. The others result in AC hum with different combination of amp-speakers. I am guessing it may be the home wiring (only 11 year old home).

1. Is there a device I can plug in the AC outlet that will eliminate speaker hum (low volume can't hear, mid volume setting start to hear, and maximum setting quite loud). I use t-amp clone and various diy fullrange speakers.

2. Is there a home structure problem?

thanks in advance

[ArtG]

All AC outlets produce hum. That's the nature of 60 Hz Alternating Current.
The very first thing to check would be that your wall outlets are wired correctly. You can do that yourself with a small yellow tester that has three little lights on it. These are available at many hardware stores and "home improvment " stores in the electrical department. They are usually in the range of $5, possibly more today. Instructions come with it. If you find any of the outlets mis-wired, you should have an electrician make the repairs. "Hot-Neutral reverse, and "open ground" are two common issues, and they are both safety issues.

If all your outlets do test okay, then you need to carefully examine the power supply wiring of your amplifier. The hum problem, may be due to incorrect wiring or bad insulation. Again, the hum you hear could also have safety consequences.

[Speedskater]

All your equipment should be plugged into the same dual outlet or power strip.
Is a musical instrument involved?

[gychang]

Originally Posted by ArtG

All AC outlets produce hum. That's the nature of 60 Hz Alternating Current.
The very first thing to check would be that your wall outlets are wired correctly. You can do that yourself with a small yellow tester that has three little lights on it. These are available at many hardware stores and "home improvment " stores in the electrical department. They are usually in the range of $5, possibly more today. Instructions come with it. If you find any of the outlets mis-wired, you should have an electrician make the repairs. "Hot-Neutral reverse, and "open ground" are two common issues, and they are both safety issues.

If all your outlets do test okay, then you need to carefully examine the power supply wiring of your amplifier. The hum problem, may be due to incorrect wiring or bad insulation. Again, the hum you hear could also have safety consequences.

Will stop by Homedepot and get AC tester. I have pretty much eliminated PS or amp source problem, since it is AC outlet dependent hum. (Have about 5 outlets in my music room and one outlet produces no hum).

[Enzo]

You can also have a "ground loop." That is where two pieces (or more) of equipment, that are otherwise working just fine, have a slightly different ground potential ontheir chassis, and when you connect them together with a signal cable, the ground/shield of that cable completesd a loop and that tiny voltage difference impresses itself on the signal.

Look up "ground loops," and for that matter "ground loop busters."

[gychang]

got a special AC strip that minimizes hum and it worked!!, realize this is a temporary solution, thanks for all the help.