You will see four different setups with this system as I bought 4 different main pairs of PSB speakers. They are the PSB 400,500,600, and 800 models. I will update the pics as I've made some changes by lowering the TV and removing the barn board shelf. I did this after my wife passed away in October 2020. What I'm about to post is my journey of dialing in the PSB Subsonic 6 in the greatroom. Its a huge room with 9ft ceilings that combines a kitchen, dining, and living room into one big room. The biggest headache with this room is not the size but its irregular shape.
I used REW (Room EQ Wizard) plus a measurement mic, a Umik1 and I started hunting for a suitable location that would give me an even sub response across all 3 listener positions. I spent 6 or 7 hours moving the sub around the room and taking measurements but I could not find a good spot. Here are the results of my hunt.
I quickly came to the conclusion that I would need multiple subs and a miniDSP to tie the subs together, I found a second PSB Subsonic6 sub for a good peice in its original shipping box.
I spent a day placing the subs at the 1/4 and 3/4 position of the long wall and took some measurements and it wasnt much better than a single sub. I then placed the subs in the corners of the long wall and took some measurents. Not great but an improvement. I decided to proceed with these just to learn the REW EQ process and get better aquainted with the miniDSP.
The first measurement shows each sub on its own and then the combination of both playing at the center or main LP (listener position)
Here's a measurement of the combined sub outputs across the three LP before applying REW EQ.
I then used REW to generate a house curve which I would load into the miniDSP to control the subs.
From the EQ'd response above, I noticed a notch between 75 and 85 Hz that had to be addressed. I did a manual EQ at the miniDSP input to try and fill in that notch. I was fairly successfull.
There was a huge improvement in the response and the bass which I felt was never in control now played nicely. I quit for the night but I wanted to try again.