Hum and radio in speakers...

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aerc10t3

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This isn't really recording, but it's at my church during live audio. We pick up a loud, annoying hum and radio station. I thought about one of those hum things, but are those for radio stations or just hum? We use regular cable to go from the power amp to the speakers, we don't use speaker cord, and I was also wondering if that has anything to do with it.

Thanks,
aerc10t3
 
Ususally when this happens it is caused by unshielded cables.
 
Start using speaker cable, and watch your audio headaches disapear.

It would be like tylenol for your pa.
 
If possible,use a power strip(s) into a single electric circuit.Are the lights flourescent?They can induce a hum.Turn the system on with the lights out as a test.Do the wires and cables cross each other?Try to route cables parallel.
You say you use "regular cable".Standard 18 guage lamp or "zip" cord would be fine for the speakers.Surely you don't mean guitar cords?If so ,DON'T!That wire isn't thick enough to handle the job.

Tom
 
Radio signals are picked up and fed to the input of the amp somehow, not between the amp and the speakers or there would be no amplification of the radio signal, I dont think I'm wrong on this but may be so chime in people; anyway, that said, look on the input side of the power amp for your radio signal source e.g., mixer, cables, guitars, mikes, etc.
As for the hum, that could be coming from Taos.
 
get an ISOBAR power strip. these things are expensive (about $100 a pop it think) but they work VERY, VERY well for eliminating hum. As for radio stations I dont know, I had this problem once at a gig and had to use another amp. A normal power supply didn't stop it but I didn't have an isobar to try.
 
My home studio is in a direct line between radio/tv towers on a hill to the south and microwave towers on a hill to the north and that puts me right in the middle of one helluva noise factory.

I get radio signals too but fortunately I have worked my rack cabling so that the only thing it really affects is my headphones. Upgrading your cables and making sure your audio cables never cross your power cables will help this a lot. Your amp itself may be picking up the radio signals, as is my problem with my headphones, and short of lead casing I don't know too many practical solutions.

As for hum, I bought a pair of ebtech hum eliminators (usually around $60 I think) and these have work miracles for me.
 
in many churches wireless mics are used. if thats not your problem then have your orthadontist wire your braces differently you may even find a station you like.

i once had a gutar amp that did that as well and i had humbuckers a little shielding took care of that.
 
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