MiniDSP UMIK-1 Microphone - Page 45 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #441 of 887 Old 03-31-13, 06:15 PM
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Re: MiniDSP UMIK-1 Microphone

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Doctor X wrote: View Post
I don't know to what frequency my SPL meter was calibrated. I just know the levels are accurate, but I don't know if response below 20 Hz is reliable or not. Have the CM-140 with the verified calibration from Cross Spectrum.

Off the top of the head:
Use the SPL meter and Generator (signal) PN Noise centered at 1000hz (in REW) turn up the volume on the Amp/Receiver to say 80db with your SPL Meter then adjust the SPL (REW) to 80db then click Calibrate, done your SPL is now calibrated.

I suggest reading the SPL in REW help files which goes through the process more thoroughly than i have above.

Hope this helps
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post #442 of 887 Old 03-31-13, 06:29 PM
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Re: MiniDSP UMIK-1 Microphone

So is 80 dB supposed to represent what? Reference level? Would I not want to set the levels to 75 dB's? I don't understand why 80 dB's is the number. Perhaps you could explain. Thanks!
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post #443 of 887 Old 03-31-13, 07:34 PM
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Re: MiniDSP UMIK-1 Microphone

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Doctor X wrote: View Post
So is 80 dB supposed to represent what? Reference level? Would I not want to set the levels to 75 dB's? I don't understand why 80 dB's is the number. Perhaps you could explain. Thanks!

I tend to use 80 because a little noisy around here and to make sure.

You can use 75 if you want.

Have you downloaded REW?
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post #444 of 887 Old 04-01-13, 06:50 AM
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Re: MiniDSP UMIK-1 Microphone

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Phillip wrote:
Have you downloaded REW?
I downloaded REW months ago. It's been sitting patiently in my notebook, so I haven't used it yet. I'm just deciding whether I should go for the UMM-6 mic or the UMIK but you guys are making it sound like the UMM-6 is the far better option right now. Think I'm going to pull the trigger.
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post #445 of 887 Old 04-01-13, 10:34 AM
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Re: MiniDSP UMIK-1 Microphone

Just another quick question. Would there be any point in having the UMM-6 calibrated by Cross Spectrum? What exactly would improve, in terms of accuracy?
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post #446 of 887 Old 04-01-13, 04:10 PM
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Re: MiniDSP UMIK-1 Microphone

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Doctor X wrote: View Post
Just another quick question. Would there be any point in having the UMM-6 calibrated by Cross Spectrum? What exactly would improve, in terms of accuracy?
Absolutely

1. Accuracy over the whole response
2. Calibrated down to 5hz
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post #447 of 887 Old 04-01-13, 06:31 PM
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Re: MiniDSP UMIK-1 Microphone

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Phillips wrote:
Absolutely

1. Accuracy over the whole response
2. Calibrated down to 5hz
Okay, but then what would be the difference between the UMM-6 and the UMIK if both were calibrated by Cross Spectrum? Sorry for asking all these silly questions.
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post #448 of 887 Old 04-01-13, 09:02 PM
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Re: MiniDSP UMIK-1 Microphone

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Doctor X wrote: View Post
Okay, but then what would be the difference between the UMM-6 and the UMIK if both were calibrated by Cross Spectrum? Sorry for asking all these silly questions.
Price i guess, post or email to Herb he would be happy to help.

Thats fine.
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post #449 of 887 Old 04-02-13, 12:04 AM
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Re: MiniDSP UMIK-1 Microphone

See this announcement from miniDSP regarding the UMIK-1
http://www.minidsp.com/forum/2-annou...eadings-in-rew
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post #450 of 887 Old 04-02-13, 06:39 AM
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Re: MiniDSP UMIK-1 Microphone

Quote:
Phillips wrote:
Price i guess, post or email to Herb he would be happy to help.
I guess I'm having difficulty understanding why the mic must be calibrated for accurate results if a calibration file could also achieve accurate results. So, for example, if the UMIK corrects the issue with consistency and enables us to measure down to 10 Hz (according to the link provided by turboman) is there still a reason to have it calibrated by Cross Spectrum afterwards?
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