Before we continue, allow we to make some suggestions about graphing.
The little floppy icon in the lower left hand cornner of the REW graphs is to SAVE graphs so you can post them. Use 800 bips wide.
Set your vertical axis to 45Hz-105Hz and your horizontal axis to 15Hz-200Hz. Use the Graph Limits icon to enter these limits and every time you measure you can go back to this icon to reset to those limits with a single click..
You can show graph comparisons on the All measured tab in REW.
Repost your graphs as outlined above.
So far it looks like your before response is better, so I'll wait until you repost.
brucek