I think I need more bass traps, where to place them??

It would help considerably if you located the standing waves and reflections in the room using a test tone on a CD or record and a sound pressure meter. Trying to find the ideal locations of multiple tube traps is a lot like trying to solve three simultaneous equations in four unknowns. As fate would have it oftentimes the standing wave one is attempting to address with a tube trap is not located directly in the room corner but say a foot or two away from the corner.

There are also room resonance calculators/simulators on the 'net. You put your room dimensions into a form, and a three dimensional depiction of where standing waves are produced in the room will be displayed. That is where bass traps should go. An active electronic unit designed to deal with the problem, like the DSPeaker Anti-Mode 2.0 Dual Core, can also be of help.

Thank you for the post guys and sorry for not being more clear. As @onhwy61 mentioned my room is almost a cube at 10’ l x 9’ w x 9’ h. Note that the back wall behind me is 36" tall, above which the space opens up to my family room and kitchen. Because the room is almost a cube I cannot tell from which dimension the axial mode is coming from.

I know that my Right speakers has peaks at 60/120/180 and since I sit with my back right against the short back wall, I have to believe this is being caused by the length axial mode which has max volume of all the modes at the extremes. What I dont understand is if I want to try to address the length axial mode should the bass trap go directly behind the speaker or on the back wall behind the seating position?  Even though the back wall is only 36" tall, it is only about 2" lower than my ear height.  

@geoffkait I am not sure I understand what you are suggesting. I measured my room response only from my listening position so isnt this where the wave is?

@erik_squires and @bdp24 I do use EQ with REW. I found that peaks are dealt with effectively with EQ but dips do not improve much.

Tbooe wrote,

@geoffkait I am not sure I understand what you are suggesting. I measured my room response only from my listening position so isnt this where the wave is?

The wave at your listening position is determined to a large extent by the other waves in the room, waves like reflected waves, standing waves in room corners, standing waves anywhere in the 3D space. Waves interact. It's quite possible to be sitting right in the middle of a standing wave.

I had great success with room equalization and did it all in the analog realm without spending much money.  I had a major issue with boomy bass in a small room last year.  I got an XTZ room analyzer Pro and it identified a big room mode at 38hz, suggesting a -22db correction. I attenuated it down about 15db with a McIntosh MQ 107 equalizer and the boomy bass issue was completely gone. One of the most immediate and dramatic changes to my system ever.  I think the digital room EQ devices work well too but the analog equalizer I got is from the 1980s and was very inexpensive.  Would be worth a try.