Lots of bass at walls, lack of bass in center of room/listening position


I guess this is relatively common in listening system. Is there any way to smooth this out so I get more bass energy at my listening position? This happens with our without my 2x 18 inch subs. Room is 12 x 16 x 8 ft, speakers 4.5 ft apart on long axis and I am sitting 4.5 feet away. I tried moving back and forward but the entire middle center of the room except near the walls has decreased bass.
Is this a boundary effect or could it be due to bass cancellation effects?
smodtactical

Showing 2 responses by steve59

Most speakers don't provide that 'room lock' bass in my room that I hear in shop demos. I can't explain why but I had a pair of speakers on stands I couldn't get any bass from so due to the insanity of this hobby I flipped the stands over, mounted them to the ceiling than mounted the speakers to that and GOT the best bass ever! Why when the speakers were the same distance off the floor as they were off the ceiling and the same distance from the corners did it make such a huge difference? IDK, but it was embarrassing when visitors would bump their heads on them walking by. lol.
Often the best sounding systems by dealers have the speakers in the most unconventional places and if you don't have the freedom to place them where they sound best you're stuck with bass traps and digital eq along with your sub(s).  Nice speakers, seriously wanted to give them a try.
These are the ns 5000? Excellent choice. I really appreciate what Eric is suggesting. I have a 6’x8’ piece of carpet hanging on the sidewall of my listening room, it helps. One day I may replace it with vicoustics or another brand, but it showed me how important taming that 1st reflection point is.