I recently bought my SoundTouch 300 for 2 weeks. Yesterday, I just realized that there are some buzzing sounds ( it sounds like scratching sound or electric wave sound) at the ends of bar's side (not the middle part). The noise is louder when I turn the volume of music down at low volume. It is kinda annoying when I just bought it brand new from BestBuy. I think there is something wrong with the bar at the end, and I have no idea why that sound comes up. Have anyone experienced the same problem? Please let me know if you guys know some solution for this. Thank you so much.