Ah, THROWBACK just sent me his diagram that he created and asked me to post it. Here it is, feel free to use it:
I've had a copy of this for awhile, but never printed it out and used it.
Decided to give it a try and printed out several copies. Noticed that the frequencies matched up with Alan Parson's Sound Check 2 disc and pulled it out. Fired up my old Radio Shack Digital SPL Meter (and a fresh battery) and settled in for the long haul while the Wife was away.
After running through the thing a few times (one channel at a time), something started to click and my random changing of levels began to make more sense. Pretty soon I had a reasonably consistent level at frequencies from 20 - 400 with a peak around 125 that I still need to tame. My big dropout around 60-70 is gone!
I then pulled out the Omnimic and checked the FR with it - pretty much the same. Very happy with the results.
Full, powerful, clean Bass with no muddiness or bloat. Fast when it should be. No room excitation on my problem wall. Overall listening is improved even further. I'm back to playing around with the room treatments trying to get the best soundstage that I can in the room (definitely different then before - I don't like it as well with the treatments where they were previously. New/different locations resulting in better sound)
Thank you THROWBACK for making this sheet! Highly recommended for anybody. It is so much easier with things written down in a well organized fashion than trying to remember what you changed a couple of attempts back.....