I always hear that you can't use REW to compare what the AS-EQ1 does. Why is that? Audyssey uses these same frequency responses to make calibrations from, so why in the are they not relevant. I am just not seeing what my AS-EQ1 is doing that a $100 BFD wouldn't. Except I could save settings in the BFD so that I can save the settings for each different tune. My PB13/Ultra can be tuned at 20Hz, 15Hz, 10Hz, or sealed.