I suffered from unbearable hum/noise with my Yamaha HS7 active speakers, made worse by doing stuff on computer like moving mouse. The speakerds were pretty much unusable. I tried connecting the to the same outletw with computer, to different outlet, to seperate outlets, nothing helped. I bought this babt and BAM, the noise is 100% gone.
If you're considering buying this product PLEASE learn what it is for and what it isn't. I've seen some 1 star reviews on amazon from people who thought this would remove hum from their guitar pick ups... This isn't for that kind of hum! It's for noise generated by ground loop which it fixes perfectly! I know people have certain bad expectations towards Behringer gear but this is a simple piece of equipment that does it's job perfectly.