Difficulty with consistent Measurements

[Timothy Ivie]

Running 5.2 Beta. Took some measurements of Dayton Audio 12" sub in a sealed enclosure yesterday and today. I noticed the dB's dropped today compared to yesterday. See the attached pic. I can't think of anything that I changed on REW and the gear is the same. Should I wait until tomorrow and get a third set of values...
Any ideas or suggestions?

 

[John Mulcahy]

Please use a more sensible graph scale, a near 500 dB vertical span is extreme to say the least. Use the Limits button at the top right of the graph and set the top to 100 dB and the bottom to 40. The second measurement looks like it came from mains rather than a sub, there looks to be an 80 Hz high pass filter active.

 

[Timothy Ivie]

Problem with UMIK not being picked up. Rebooted computer this morning with better result. Using MiniDSP Umik and 2x4 with 2.1 plugin. Looks like 80 dB might be a good starting point for to a high pass filter. The mains are a pretty efficient pair of Klipsch RP600m. Any other observations or suggestions are appreciated. Thanks