Hi i just bought a used center speaker the polk cs10 and what should the crossover be? I have a t30 in my home theater in the basement and thats set to 100. The cs10 is in a livingroom with in wall speakers and in ceiling speakers for rears. What is a good crossover for my in wall and in ceiling. Front in wall are set to 100 and the ceiling are at 120. Dont know the model they where installed like 7 years ago and hardly used.