If you didn't rerun auto calibration the receiver will not work correctly.
Put volume knob on sub at 11 o clock, Crossover knob at max. Can't make it the switch text. Is ones phase, set at 0. Is the other is auto on, set at auto.
Now rerun auto calibration.
After completing, setting speakers to small is good. In receiver set crossover to 80.
Best of luck.