I bought a new bic f12 powered sub to go with my pioneer 1020k receiver. It's set up in 7.1 format. I hooked up the sub through the lfe out from receiver to the in for the sub. I've got the system set to small for my front, center, side and rear in wall speakers and in the settings for xover I set it to 80hz. When I turn the power on the sub halfway I hear a rumble all the time. I keep it set at 4 on the power but it barely hits hard this way. What can I adjust to eliminate the rumble so I can increase the power on the sub, or is there an alternative method.
I've adjusted the xover from 50 to 100 but its still present. Thanks for any help.