So hear in the midwest the temperature has dropped and my speakers character has changed with it. It seems that the bass has moved up in the audio spectrum and speakers sound much more forward with less timber... I havent changed anything in my system and this phenomena has happened with both sets of my Altec speakers. I think it has something to do with my listening space, the humidity in my house, or cold windows and walls. The walls in my listening space has very hard reflective board on the walls, with 5 large windows, 2 behind the speakers and 3 to the left. The one bank of windows behind the speakers is 5' X 5'. the other is 9'X5'... Any ideas why the sound of my systems has changed so much? Has anyone experienced something like this? Thanks