UMIK-1 vs UMIK-2

Sonnie

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I know there are posts about this in some other threads that are not specifically dedicated to this very subject, so I am posting it here to keep up with it. I have sent the info to miniDSP support.

I am getting two totally different measurements with the UMIK-2 vs the UMIK-1. I noticed after using the UMIK-2 with REW that the response curves were looking suspicious, and thought maybe the firmware had not been updated. I downloaded it and updated it to be sure. As you can see below, the bottom and top end is significantly different. I certainly don’t trust what I am seeing with the UMIK-2 and it give

Below are comparisons of what Dirac measures with the UMIK-1 vs the UMIK-2 … and what REW measures after Dirac calibration using each mic with their respective calibration files.


UMIK-1 in Dirac
40423


Here is UMIK-2
40424


Here is the response I am measuring for the Dirac calibrated response with the UMIK-2 … look at 5kHz and up… not correct by any means… the cal file is show above the measurement.
40425



Here is what it looks like with the UMIK-1… which I trust, as it looks correct.
40426
 

Sonnie

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I read somewhere that versions below Dirac 3 do not support the UMIK-2 correctly. Don't know if that applies to you, Sonnie.
It shouldn't, I'm using the latest version 3.0.14.

I'm gonna give it another go in the next few days to make sure I didn't have something set wonky.
 

JStewart

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It’s interesting the SPL differences almost appear to be the inverse of the umik 2 cal file plot.
 

Sonnie

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I noticed one time I got different results and the tilt was not quite as bad. It may be something to do with the resolution settings.

I'm going to do some more testing for miniDSP to try to figure it out. Apparently they are still seeing issues.
 

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Sonnie

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Apparently I had some setting off somewhere. I stepped thru the UMIK-1 this afternoon, then swapped over to the UMIK-2 and it worked fine. I fiddled with it for several hours the other night and never could get it working like it should. I'm just not sure what I missed, UNLESS, I may have had double calibration files loaded in REW. This time I cleared everything out, made sure I had all the settings correct... ran a bunch of sweeps, both mic with their cal files matched up perfectly, so it was all me.
 

AustinJerry

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Glad you figured it out. When i received my UMIK-2, I ran extensive comparisons with my UMIK-1, both using CSL custom calibration files. I saw no significant differences. As advertised, the UMIK-2 seems to be slightly more sensitive.
 

Sonnie

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Yeah... I'm not sure I'd ever be able to note any differences between using either mic.
 
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