Subwoofer output closer or farther away from wall

I pushed the subwoofer closer to the wall, and the improvement of the low end in comparison to the previous set up is not small. Now, I can feel, I guess hear it being more active than before. The other question that I have Kchahoc, you have the same subs, right? Was there a different between having two instead of a single one? I wonder. They are on sale now, but I wonder, if I will be able to hear an improvement should I get a second one, or I will overbassing my listening room. How is this sub in comparison to others you have heard?

I am very confused with the manual set up of the Rabos system. At first when I was doing the level of the system, I could not get the system to go to 0 db as stated in the manual, the closest I could get was 1 db. So, now that I pushed it to the wall, I am sure I will get more output. The questions I have are several.

First, how did you manage to get to 0 db as stated? I had to crank my main horn speakers and and the sub to get it to 1 db, should the output be calculated, flatly with the sound output of the sub? I got my volume control to about 11 o'clock to get the 1 db. That is question 1.

Second, when I began the measurement of the width, I as a smooth plot at 1 db from 100 hz to about 60 hz and from then on, there were variations. For whatever it was worth, I had a hump or peak at 45 hzFrom there on, I read the scale and began to measure the gradations, attempting to get the W, L, Fr at the peak hump to be as flat as possible to 1 db level. Is what I did right?

The manual is very bad in explaining the set up, so I had to interpolate information to get all the information and also, to deductively adjust the sub. I will have to re run the test now that I have placed it closer to the wall.

I would like to have some answers to the inquiries that I have.

Thanks.