I have a pioneer av 1131. When I go into speaker setup (crossover) and change from small to large speaker my sub output seams to quit? I have 4 large towers and would like the settings to be true to what I have. I have recalibrated speakers after changing settings to large speaker..still no sub. When I change it back to small the sub works again? What am I missing? Any help surely would be appreciated!! Thank you!!! I believe I got it..