Tried a few readings today on my PB13 (put it in sealed mode to try it out). The first graph is with the sub placed on the right side of the room (in a corner), the second is the sub moved to the left (one side to the open doorway). No EQ applied by the sub's amp or the receiver. Crossover on mains set to 80hz, the below is sub only. Curious as to why I have such a huge drop off around 40hz, settling some 8db down at 55hz, then dipping again at 95?
Sub on right
Sub on left

Sub on right
Sub on left

