[thewire]

I also tried a measurement during the building of my bass traps and it did not seem right. I didn't even save the result until I had at least filled the corners with Roxul. That gave me a large smooth bump from 20Hz up to my peak which was left unchanged in around the 50Hz area. If you are looking at reflections that are not in the corner use the impulse response window and set the Y axis to %FS. Then right click and hold control to measure from the largest peak (your starting point) to any other peaks that may be present.

Before I remembered to do this I knew I needed bass traps on my back wall but I couldn't seem to be able to measure anything indicating a problem in my front row. Then I found the peak at near 33ft indicating that my now largest concern is a reflection off of my back wall and my side wall combined.