Correct speaker, but sizzle

Given the high marks given to these speakers by previous buyers, I hastened to order these speakers on Amazon. As usual, the transaction was very well, thank you Amazon.
These speakers are not expensive, and for that price, we can say that the sound is very good.

They have still a large significant flaw: they sizzle. When listening to music, for example, covers the crackling sound so it is not annoying. But if you leave them turned on without using (I mean they release without sound), you may hear a very unpleasant sizzling.

For the same price, I found the speakers Trust Soundforce 2.0 Speaker Set universe much better.