EMM-6 need calibration? - Home Theater Forum and Systems - HomeTheaterShack.com

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post #1 of 15 Old 04-21-13, 01:03 PM Thread Starter
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EMM-6 need calibration?

I came across lot of discussion about measurement mic and their calibration. Dayton EMM-6 provides calibration file if you enter the serial at their website.
Cross-spectrum charges the 30$ extra for mic to get it calibrated.
There is also a calibration value file at download area of this forum.
I am planning to use my mic for room modes measurement and frequency response of my speaker systems.
Can someone clearly define the advantage of getting calibrated from cross-spectrum vs using values from Dayton?
Parts express assures it is calibrated for each individual unit and not even for the same batch. There are some trust issues here.
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post #2 of 15 Old 04-21-13, 05:26 PM
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Re: EMM-6 need calibration?

Cross - Spectrum also sells them, calibrated and all.

Depends if you intend in using a EQ also for accuracy.

What i have seen Dayton do a reasonable job.

The advantage is accuracy and for the small price i think it is worth it.
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post #3 of 15 Old 04-21-13, 07:49 PM Thread Starter
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Re: EMM-6 need calibration?

Thanks Phillips.I am wondering if you can explain more. What would be considered a resonable vs more accurate?
What all improvements can I expect from using a calibrated mic over the one using Dayton calibration data?
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post #4 of 15 Old 04-21-13, 09:56 PM
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Re: EMM-6 need calibration?

The CSL-calibrated mic is more accurate. The PE cal file (or at least the one that I got) might as well be thrown away. Comparison:

http://www.hometheatershack.com/foru...tml#post594074

PE cal file plot in red:

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post #5 of 15 Old 04-22-13, 04:03 AM
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Re: EMM-6 need calibration?

My file attached

The scale is different but shows clearly the difference.

The Red is Dayton calibration (20- 20,000hz) the other Cross - Spectrum (5 - 25,000hz).

Hope this helps.

EMM-6 need calibration?-comparison-calibration.jpg
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post #6 of 15 Old 04-22-13, 09:56 AM
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Re: EMM-6 need calibration?

Another Comparison:
EMM-6 need calibration?-mic-cal-files.jpg
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post #7 of 15 Old 04-22-13, 11:54 AM Thread Starter
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Re: EMM-6 need calibration?

Do you think behringer MC8000 will have a better frequency response? I mean with the peakiness at 10KHZ
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post #8 of 15 Old 04-22-13, 03:24 PM
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Re: EMM-6 need calibration?

Wow, those Dayton EMM-6 cal files are a mess. No-one should use those.
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post #9 of 15 Old 04-22-13, 03:28 PM
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Re: EMM-6 need calibration?

No, all the low cost mics have significant SPL deviation in the low and high ranges and there is significant variability between individual mic.

When an accurate individual calibration file is loaded into REW the mic response is corrected and the room response measurements become accurate.
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post #10 of 15 Old 04-22-13, 09:23 PM Thread Starter
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Re: EMM-6 need calibration?

John,which calibration files you are referring to,one on download area or one Dayton audio provides?
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