Dayton emm6 calibration problem - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 2 Old 02-12-2012, 10:51 AM - Thread Starter
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So I bought the dayton emm6 mic for measurement, connected to M-Audio FireWire solo connected via firewire to my win7 htpc running REW and minidsp and all was well when I got the connections working but after calibrating the sound card it seems I have a 20db notch at 50hz which I don't believe is really there. I think I would be able to hear and see that kind of hole during a sweep. Is it possible it's the mic? I know people were sending back their omnimic sets and this uses the same mic ( I believe). It has a 4 digit numerical calibration code. So after hours of fiddling, I balanced the 3 sub amp levels in minidsp and let the receiver do its calibration like Audessy. Harman calls it EZ setEQ and it works pretty good.

Any recommendations?

Sr7009 + external amp for 9.3.4
jbl - northridge x11; sp6cii ceiling
Dayton HF15 sealed x2 on xls1500
av123 mfw15 w/ bash 300
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post #2 of 2 Old 02-12-2012, 02:04 PM
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The Omnimic mic is completely different from the EMM6. You use the 4 digit serial number on the EMM6 to download the calibration file from P-E for you specific mic. You'll then need to tell REW to use the cal file for the mic.

50Hz has a full wavelenght of 22.5'. It wouldn't be hard to find yourself in a 1/4 or 1/2 wave null in a typical residential setting.

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