Sorry I don't have the Info like I do with the other speakers Mitshubishi M-CTR5 , 100 watt, 8 olm 15 lbs weight. I have never had this issue before, even with the Denon receiver connected. So I think it must be the cheap Yamaha Receiver I bought 5 years ago. We are selling our Beach Home and moving to Tellico Village Tn. soon and I'll be closer to a big city (Knoxville) and be able to shop for a new receiver. And maybe they will let me test it on my speakers.