low bass response

If it's the room or listening spot, walking around should answer your question.  There will be nodes.  

That room is far too reflective and those speakers have wide horizontal dispersion. A bad combo. The entertainment rack is enclosed in another very reflective piece of furniture. If you must put the speakers in this room:

• Get rid of the armoire
• Point the speakers at 45 degrees to the wall
• Treat the room with absorbers, including the ceiling, especially the ceiling with mid-high frequency (i.e. thin) panels
• Put diffusors where the armoire is and to the sides and behind the listener. Absorb otherwise.

Honestly not a fan of Pass here either.  I mean, I don't like the sound but exactly because I find them too lean sounding.  Other alternatives are just to use tone controls.  Get a Schiit Loki and see if it does what you want to do.

Remember that your listening levels matter.  If you like to go in and listen at quiet volumes like I do a loudness control is essential.

Oh, as an experiment, throw a blanket over the armoire.  You'll be amazed at the changes. :)  You can do the same by throwing some cushions into the corners or hanging up blankets.  Anything you can do to demonstrate the changes would help you move in the right direction.

the position nor armoire Will affectbass reproduction you nave a lot of air Ii that room that size you need a good subwoofer 12inch fast articulate bass

we sell many brands of subs paradigm elac mj acoustics 

please contact us for a proper discusion

dave and troy

Audio intellect  nj

Subwoofer is needed. I have a room just a bit bigger and the same problem. Even though my speakers are rated at 20 - 20k they don't have low bass. One sub was a tease. Two Rel S5 did the job

 Sounds great now.

BTW I tried all the above fixes. They didn't fix the problem.