I was using Avia to check some brightness and sharpness tonight. Now, I still had my receiver on from the previous movie I was watching and the volume was somewhat high. On any rate, as the video test pattern on Avia switched to the next pattern I heard this "oooomp" noise - a result of changing from one pattern to the other. It didn't sound very good at all. Can this damage my speakers? You would think Avia would have made the video pattern screen change to be silent.