Maybe play with your sub placement, but I have my subs 120hz and don't hear them when I shut one off directionally and below 100hz, no one should. As for the center, with two 4.5" mid wofders and an 8" bass driver in that size cabinet, I wouldn't want it handling lower frequencies. Just my opinion after years of doing this. My two channel mains play down to 20hz in room, measured 23hz anechoic and I cross to my subs at 70hz to them..\n\nI don't understand. Please clarify. Do crossover to your subs at 120Hz or 70Hz? What does "don't hear them when I shut one off directionally and below 100hz" mean?