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Discussion Starter · #1 ·
I have an Integra DHC 40.1 with MultEQ. After Audyssey calibration, the pre-amp test internal test tones are supposed to read 75dBC at listening position, but mine reads 70dB. With REW measurements, things look consistent. Is my CM-140 off by 5dBC?
I am in Portland, OR. If it is off, is there a place I can get it calibrated locally? Can I calibrate it myself and if so what is the procedure? If not, where do I send it in for calibration?
Has anyone else gone through this before?
BTW, with REW, I use the CAL fine of course.
Thanks,
-Jai
 

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Discussion Starter · #3 ·
I doubt the meter is off a full 5 dB. I don't see where it's that big a deal if the meter doesn't read 75 dB after calibration, but you might run your concerns past the folks at our Audyssey MultEQ Discussion Thead and see what they say.

Regards,
Wayne
Wayne,
Just posted there and hoping for a response.
What do folks here notice in SPL levels after Audyseey calibration at listening position?
Thanks,
-Jai
 

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Discussion Starter · #4 ·
I doubt the meter is off a full 5 dB. I don't see where it's that big a deal if the meter doesn't read 75 dB after calibration, but you might run your concerns past the folks at our Audyssey MultEQ Discussion Thead and see what they say.

Regards,
Wayne
Also compared it side by side to the old analog Rshack meter and they both read exactly the same 70dBC.
 

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Many things can affect this. Are you hand holding the SPL meter when taking measurements? Your body produce some weird effects. Is the mic of the meter in exactly the same place as the Audyssey mic was?
 

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Discussion Starter · #6 ·
Many things can affect this. Are you hand holding the SPL meter when taking measurements? Your body produce some weird effects. Is the mic of the meter in exactly the same place as the Audyssey mic was?
Hi Greg,
I have tried it on a tripod and also at the first position of the Audyssey mic. It is consistently around 70dBC at listening position. The pink noise is 500Hz to 2KHz and less prone to reflections.
Thanks,
-Jai
 

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How about absorption?
If you have MultEQ, yo umeasured at several locations, yes?
 

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I'm not sure which mics he can/can't do, but Anechoic (Cross Spectrum Labs) is pretty reasonably priced.
 
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