I have set my speakers to a crossover of 100 & 90 on my Denon reciever through advanced set up. It asks me to set the crossover for the LFE...im assuming this to be approx the same setting as the speakers? It asks me the crossovers for the diff speakers e.g Centre - 100; Front L - 90 Front R - 90 Surround L - 100; Surround R - 100; LFE - ???