Well…. I used to have SL A-4 , if anyone knows about them , very old model, beautifully sounding – many moons ago… I kept them on all the time back in days… Once I went for vacation and when I came back humidity in room changed a lot. Crackling was so loud and terrible … Very soon I had to change panels. You do whatever you want guys – it is your money! I dearly like Dr West but with some suggestions I do not agree.