Sub integration problem

[N Boros]

You only mention level, but could it also be an issue with phase? Whether you adjust the sub to MLP distance in your pre-pro/AVR settings or adjust phase it manually with the switch/knob your sub has, that also has an impact.

Good point. Here is a guide I thought was very helpful to calculate this beforehand and then just set the dials accordingly:

http://www.rythmikaudio.com/phase1.html