Okay so here's my situation. I've had this H.H. Scott 359RS receiver for quite some time now, and I use some KLH Model 23 speakers with it. It was having a problem with the tuner memory, so I bought another receiver off of eBay, a Realistic STA-820 to be exact. I turned the volume way up, and it sounded like it blew the speakers. They still work, but I get a buzzing noise if turned up too loud, which I wasn't before. I sent it back for a refund. I then decided to take my Scott receiver and KLH speakers to Audio Pro in Watertown, MA. Vince (the guy who works there, I think he's been talked about here) tested them out, and claimed that there is nothing wrong with them, but he thinks it's in the receiver. I had my Scott receiver serviced, but I am still not sure. However, I did have my tone controls (Bass and Treble) jacked all the way up. He stated how nobody ever does that. But the thing is, I never had this issue until I supposedly "blew" the speakers with that Realistic. So what do you think? Do you think my speakers are shot?