Im currently in the process of building a starter home theater system.I have ordered Energy bookshelf speakers along with a Energy subwoofer but for now im using a nice sounding pair of Yamaha NS-6460 with an 8 inch woofer ( frequency response says they go down to 45) and the crossover on my Onkyo receiver adjust from 60 to 150.What I would like to know is what should I set the crossover to or whether it matters at all?