Noise from Speakers

Hi Everybody

In the past, I had got a sony surround amp, I heard some noise (士..士........ 聲) from 高音單元 of speakers after the amp was powered on but no any audio signal input.
Now, I have get a new marantz surround amp,  but I still heard some noise (士... 聲) from 高音單元 of speakers.
My amp, speakers and sacd player are new, they are not more than 1 year.
Why ? Is the problem at amp, speakers, or cable, or electric power ? Is the noise from 220V ?

Please fix it. Thank you very much.

Jim