I looked at some of the other threads on crossover adjustment and found myself getting progressively more confused, so I thought the direct approach would be best. What should I do about crossover on my HTB-504? I doubt I've done anything to the little knob on the back of the sub since I set it up. One thing I keep noticing is that the sub will cycle on and off occasionally, mostly when I'm watching TV (I think it automatically turns off after a certain period of not being used). Oh, and because I seem to be incapable of starting a thread and asking only one question: is it OK to have my sub plugged into one of the switched outlets on the back of my receiver?