Jerry: Is your UMM-6 mic still functional? As one of the few (if not only?) members with both mics, I was curious if you've tried a side by side measurement to compare any differences between the two? IIRC, you got the UMIK-1 because your UMM-6 finally gave out so even a comparison from your extremely precise mic placements from different measurement sessions might be interesting (assuming you've also documented the precise location of all your treatments given the recent experimentation!).
The custom calibration files from CSL should ensure that these mics compare favorably with the reference mic, and therefore be quite close to each other.
Edited by AustinJerry - 7/16/13 at 6:55am