Understanding phase graph

Gordon Palmer

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Thread Starter
Joined
Mar 21, 2019
Messages
12
Could someone please explain what this graph shows in respect of the phase plot.
Is it good, bad or so-so

Thanks
Fronts+sub XO 120Hz.jpg
 

jtalden

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Not much info there. An overlay phase chart has more value when timing the XO, but:
It suggests:
It is likely a anechoic or quasi-anechoic measurement as no room influences are indicated.
It displays a typical phase rotation through the bass range

It hints that:
There may be a high-pass filter applied around 20 Hz or so thus increasing the phase rolloff in the low bass.
There may be an acoustic XO at about 110 Hz with favorable timing selected that minimizes the overall group delay.
 

Gordon Palmer

Member
Thread Starter
Joined
Mar 21, 2019
Messages
12
Not much info there. An overlay phase chart has more value when timing the XO, but:
It suggests:
It is likely a anechoic or quasi-anechoic measurement as no room influences are indicated.
It displays a typical phase rotation through the bass range

It hints that:
There may be a high-pass filter applied around 20 Hz or so thus increasing the phase rolloff in the low bass.
There may be an acoustic XO at about 110 Hz with favorable timing selected that minimizes the overall group delay.
thanks
 
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