2. speakers
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High pitch buzz in speakers after adding some LEDs

We recently added some RGB COB LED strip 24V lighting to the HT. These are wall panels. When it changes colour from the DMX we are getting a high pitched buzz coming from some of the surround speakers just for a few secs when the colours are changing. I dont hear it but my AV installer does and some friends also hear it. This has never happened from any of the older LED lighting in the HT.

Is this a faulty power supply even though its brand new?

Thanks in advance...

murray24
rick_n's avatar
rick_n
242 posts
 

High pitched buzzing is often a grounding issue.  I would start there.  

murray24 OP
4 posts
 

Ive had other LEDs in the HT for 15 years and naver had this issue, its just the new ones added has caused it. I was reading another forum where a guy had the same issue, he followed all the recommended test but nothing worked. He then decided to change the power supplies and bingo the buzz went away.... Do you think thats a good starting point?

tony1954's avatar
tony1954
1,123 posts
 

"He then decided to change the power supplies and bingo the buzz went away.... Do you think thats a good starting point?"

Um...yes.

carlsbad2's avatar
carlsbad2
1,836 posts
 

Don't do that. 

JK.  LEDs are known for that but only sometimes.  I have LEDs in my listening room no problem, but they are 10 ft from the equipment and on a different circuit.  I also have a PS audio power regenerator and 2 dedicated circuits.

murray24 OP
4 posts
 

The power supplys were really cheap ones from China without any covers for the 230V AC, I want to buy a better qaulity power supply regardless. 

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