I couldn't figure out why my studio monitors were so noisy with a constant buzz, was even thinking of returning them or having them repaired. It turned out to be because I was connecting them to my audio interface with unbalanced 1/4" TR to XLR microphone cables. Using this adaptor with a standard xlr cable and a female to female barrel connector on the other end, I was able to eliminate the noise. Now they sound the way they should. (silent when nothing is playing)