Hi, I decided to ask the question here before I turn my house upside down looking for the manual. If the sub is connected via a low-level input from my receiver, and the crossover frequency is set in the receiver (at 80 Hz), do I need to also set the crossover on the sub as well? I accidentally turned the crossover knob instead of the volume; I can't remember if the low-level input by-passess the crossover setting or not. I know it would be "safe" to set the sub to above 100 Hz bt I still would like to know. Thanks a lot.