SPL meter vs Audyssey mic

Hey Chris how are you doing? I have a question,

Today i measured the volume levels of my speakers with a Voltcraft SL100 digital spl meter. It was set on slow and C weighted and tried too set all speakers too 75db.

These where the measurements of Audyssey:

Fronts L+R: -10.5 , Center: -12, Surrounds: -8.5 and subwoofer: -1.

With the SPL meter i got other values ( was sitting at the exact location where the microfoon was ):

Fronts L+R: -7.5 , Center: -9, Surrounds: -7.5 and subwoofer: -1.

 

So witch values are more accurate? I dont know what class the audyssey mic is but the volcraft is a class 3, accuracy ± 2 dB (94 dB/1 kHz, delay 125/1000ms

 

 

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3 Comments

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    Chris Kyriakakis

    Hi Martino,

    You should use whichever method you trust more.

  • 0
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    martinodacosta

    I dont know witch too trust. How accurate is the standard audyssey mic? Is it also a class 3 mic or class 1?

  • 0
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    Chris Kyriakakis

    Classes are only relevant for SPL meters.  The Audyssey mic is a measurement microphone.  The method of measuring SPL also matters.  SPL meters use RMS and Audyssey uses a psychoacoustic weighting.  SPL meters are not very accurate for subwoofer levels.  I suggest you go with the Audyssey findings.

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