The port on these speakers appears very small, and could be causing a reflection off of the wall/corner that effectively cancels out the frequencies you mention.
First - remove the bass traps - temporarily
Try different distances from the wall with the speaker toe-in at around 5 degrees. Keep the speakers about 7 feet apart to start with.
Once you have reasonably good bass performance try varying the space between the speakers and then adjust toe-in for a final adjustment
Once you get a pleasing sound re-install the bass traps to see if they are over compensating on certain frequencies
You may then need some minor adjustments for best sound once the traps are installed
I have a pair of studio monitors that suffers from a similar problem - they required over 1 meter of space behind the rear of the speaker, but since I did not have that much room, I ended up installing a cowling over the port which redirected the airflow downwards. This seemed to resolve most of the issue - the rest was remedied with correct speaker placement/toe-in.
I can now place the speaker much closer to the wall - i.e. down to 8 inches
My speakers originally came with a foam plug for the port that helped a little - it did not stop the airflow, just slowed it down a little
Personally - I do not use meters for two channel systems - I let my ears be the judge.
I do find a meter helps greatly with Surround Sound systems
Regards...
First - remove the bass traps - temporarily
Try different distances from the wall with the speaker toe-in at around 5 degrees. Keep the speakers about 7 feet apart to start with.
Once you have reasonably good bass performance try varying the space between the speakers and then adjust toe-in for a final adjustment
Once you get a pleasing sound re-install the bass traps to see if they are over compensating on certain frequencies
You may then need some minor adjustments for best sound once the traps are installed
I have a pair of studio monitors that suffers from a similar problem - they required over 1 meter of space behind the rear of the speaker, but since I did not have that much room, I ended up installing a cowling over the port which redirected the airflow downwards. This seemed to resolve most of the issue - the rest was remedied with correct speaker placement/toe-in.
I can now place the speaker much closer to the wall - i.e. down to 8 inches
My speakers originally came with a foam plug for the port that helped a little - it did not stop the airflow, just slowed it down a little
Personally - I do not use meters for two channel systems - I let my ears be the judge.
I do find a meter helps greatly with Surround Sound systems
Regards...