I purchased R-41M bookshelf speakers last June and theyve been working as great channel speakers but recently stopped. They have a very loud crackling/static noise with audio being inaudible. Im not sure what to do, I changed the wires so i figure its not a connection issue, theyre connected through banana plugs to my Sony STR DH790 and not sure if what the issue is. I sent the reciever to Sony and they told me everything works fine on their end, but find it doubtful both speakers blew at the same time without any catalyst.. Any guidance?