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post #1 of 33 Old 09-08-16, 03:17 PM Thread Starter
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Advice For Measurements

I am wanting to start from scratch with measurements so I can use the help. I have a uncalibrated mic but have the downloaded calibration file. I am using the ECM8000 mic with the M Audio pre. I would like some help with how do I measure my room? Both channels together or one at a time? Measure from the listening position with the mic pointed straight up or pointed at the speakers? The mic should be at what height? etc, etc.

Also would like some advice as to the best setup for using the REW program...
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post #2 of 33 Old 09-08-16, 05:12 PM
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Re: Advice For Measurements


Measure one speaker at a time, from the listening position with the mic at ear level. If you downloaded our generic calibration file for the ECM8000, it’s a 0-degree file, so the mic should be pointing at the speaker.

Regards,
Wayne




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post #3 of 33 Old 09-09-16, 08:32 AM Thread Starter
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Re: Advice For Measurements

Ok Wayne thanks brother...
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post #4 of 33 Old 09-16-16, 06:58 AM
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Re: Advice For Measurements

Hi,
Perform several measurements from several locations, everywhere your ears are supposed to move around, even if it is 20 cm apart from the central one.

Seeing how different they are will save you the time wasted to accurately correct a 3 dB dip at 128 Hz exactly, while there is a 2 dB peak at that same frequency if you take the same measurement just 40 cm away...
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post #5 of 33 Old 09-16-16, 07:04 AM Thread Starter
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Re: Advice For Measurements

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Pio2001 wrote: View Post
Hi,
Perform several measurements from several locations, everywhere your ears are supposed to move around, even if it is 20 cm apart from the central one.

Seeing how different they are will save you the time wasted to accurately correct a 3 dB dip at 128 Hz exactly, while there is a 2 dB peak at that same frequency if you take the same measurement just 40 cm away...
Not real sure what you mean by saving time, I only listen from the listening position. I realize my head will move a little but I usually sit still during a session.
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post #6 of 33 Old 09-16-16, 11:49 AM
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Re: Advice For Measurements

I mean that to get a perfectly smooth curve is very difficult and time consuming. And in fact, it is completely unuseful.
Comparing different measurements between them allows to visualize directly what, in the curve, is a characteristic of your listening position, and thus is worth correcting, and what is an accidental artifact of the measurement, thus not worth correcting.
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post #7 of 33 Old 09-17-16, 09:45 AM Thread Starter
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Re: Advice For Measurements

Quote:
Pio2001 wrote: View Post
I mean that to get a perfectly smooth curve is very difficult and time consuming. And in fact, it is completely unuseful.
Comparing different measurements between them allows to visualize directly what, in the curve, is a characteristic of your listening position, and thus is worth correcting, and what is an accidental artifact of the measurement, thus not worth correcting.
Ok the problem I see with that is, I can get the mic to the exact same place every time based in measurements. Doing that in multiple positions will next to impossible and a huge time consuming task!!!
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post #8 of 33 Old 09-17-16, 09:48 AM Thread Starter
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Re: Advice For Measurements

Another question, when measuring just the speakers from 1 meter do I measure the 1 meter distance from the driver or the mouth of the horn in my case?
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post #9 of 33 Old 09-17-16, 09:50 AM Thread Starter
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Re: Advice For Measurements

Quote:
Wayne A. Pflughaupt wrote: View Post

Measure one speaker at a time, from the listening position with the mic at ear level. If you downloaded our generic calibration file for the ECM8000, itís a 0-degree file, so the mic should be pointing at the speaker.

Regards,
Wayne

Wayne, so I should point the mic at each speaker for this not down the center of the two???
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post #10 of 33 Old 09-18-16, 02:47 PM
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Re: Advice For Measurements


You can do it either way, shouldn’t make any impact on the measurement.

Regards,
Wayne

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