I had just bought a new USB powered speaker. JBL Pebble.
Anyway I had this problem when I tuned my speakers to like more than 50% and above, there is some static sound coming out from the speaker. Static sound that reacts when I scroll my mouse, when I click, when my HDD is loading.
I tried using an external USB charger to power the speaker and all the static sound is gone.
I also tried using my computer to power the speaker and the 2.5mm jack connected to my headphone and there is no static sound either....
Best Answer Andre S. , 23 November 2013 - 21:00
Hmm but when my desktop is powering the speaker using its usb and I am playing music with my handphone it works totally fine.
It looks like your problem is analogous to a ground loop; when your speakers are connected via two cables to your computer, this creates an unwanted electric circuit carrying noise with it. Either power your speakers by another source or isolate one of the connections as I suggested.Go to the full post