I have one complaint, there is a low hissing noise from the subwoofer, even though the speakers are turned off

I thought 50 watts would mean distinctive, well noised listening enjoyment that would be at least noticeable but after trying out different devices and

Speakers make a loud humming noise even when just plugged in and powered off.

Then about 1 month later, the left speaker has this constant "thumping and humming" noise when nothing plays

Unfortunately, when I plugged in the sub woofer (by the way it does not have a volume control for the sub) into the outlet a loud humming noise was coming from the sub woofer.

A little scratchy on sudden loud noises, but otherwise they are good for the price for me

Speakers are great but the woofer emits a low humming noise as soon as it was plugged in and noise continues throughout usage.

School stated this week and I turned them on today and they are making a awful humming noise!

but then after about 1 month the right speaker would have a slight "hum" noise if I had them on and no music would play

I purchased this Logitech speaker system to replace a similar CA computer speaker system with subwoofer which started acting up with a humming noise after a power outage

Plenty of other reviews mention the quality of the wiring; in my case the subwoofer started to emitt a loud buzzing noise, only 3 days after using it

As time progressed the noises, a sound emitting like a single piston gas engine or a small jack hammer started growing in intensity

A real life example to explain this to you is that if it's late at night, people are sleeping in your locale, and you still want to listen to loud music in your headphones; ideally louder than the volume your computer provides and therefore you are plugged into the back of the subwoofer, the subwoofer will STILL produce noise on a 1:1 scale if it were plugged into the speakers

That being said after a little over two months of owning these the right speaker now has a very noticeable nasty bit of scratchy, feedback, static noise coming from it behind the music and sound

I noticed when I up the box it made a rattling noise like something was broke

It has a terrible noise when it's active

item started making a "static" noise.

You do have to be careful how you position the very thin wire connected to the bass woofer, otherwise it can produce a humming noise.

I traced the issue to the bottom of the subwoofer where it was giving off the odd, constant noise whenever it's plugged into an outlet.

But after less then a months use it started making a weird noise

The sound isn't as good as I