I have this Behringer 1500 Watt Speaker Making Hissing noise when you power it up, Changes With Volume. I have it apart and Do not see anything Obvious , any Help Greatly appreciated https://medias.audiofanzine.com/images/thumbs3/pa-live-sound-2758420.jpg
https://medias.audiofanzine.com/images/thumbs3/pa-live-sound-2758421.jpg
https://medias.audiofanzine.com/images/thumbs3/pa-live-sound-2758423.jpg

If I could figure out how to Upload the Video, I have one you can HEAR

John
metwrench@aol.com