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Discussion Starter #1
how can I measure the polarity (wrong or good) of chassis with REW ?
I measure in a distance of one meter in front of the chassis with the 0 ° Calibrationfile of microphon.

thanks, Alpi
 

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REW Author
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If you mean the drive unit polarity, you can get an indication from the direction of the impulse response when the display is set to % (not to dB). It can be tricky though if you are measuring a speaker with multiple drive units.
 

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Discussion Starter #3
Re: measure the polarity of a drive unit

Hi John,

yes i mean the drive unit polarity. I have an active System and i measuring only one drive unit because my Problem is i can't read the Graph.

Center_TT.jpg

Center only the bass unit

links_TT.jpg

left only the bass unit

rechts_TT.jpg

right only the bass unit

thats are the right Graph?
 

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REW Author
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You have plotted the envelopes, those won't help as they are always positive. It is the impulse response you need to look at, which is the first trace in the Impulse Response graph.
 

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Discussion Starter #6
Re: measure the polarity of a drive unit

Thank you, here the new measures only for the bass unit and i hope this was the right graphs.

Center only bass.jpg

Center only bass unit

left only bass unit.jpg

left Speaker only bass unit

right only bass unit.jpg

right Speaker only bass unit


Alpi
 
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