As Speaker Dave says
However in your case it is a good sign when the phase plots are parallel, because as ctrlx says once you get the slopes on either side to be similar, things begin to fall into place.
So you can't be sure what is best unless you do a full set of measurements.
However in your case it is a good sign when the phase plots are parallel, because as ctrlx says once you get the slopes on either side to be similar, things begin to fall into place.
Xman67,
Of the three XOs that you show in Post #17, XO-2 seems to have the best phase tracking.
In regards to Speaker Dave's post #3, take a look at your XO-2.
Notice that the summation is around 88 dB. Look at where the drivers are 20 dB down (~68 dB). (Below that, they aren't contributing much to the summation.)
The tweeter is 20 dB down at about 1700 Hz and the woofer is 20 dB down at about 5500 Hz. The crossover point is around 2900 Hz.
If I read the phase curves correctly, the two drivers are tracking closely up to the crossover frequency, but then they diverge above that.
Speaker Dave comments that,
So that is a good rule of thumb: strive for a phase difference of less than 90 degrees over the range where either unit is within 20dB of the other.
Others have noted that 30 deg or less is very good phase tracking.
Ctrix shows an example with very close phase tracking through the crossover region (approx. 1800-5100 Hz). Probably less than 10 or 20 deg.
I would suggest setting up XO-2 configuration and then listen to it. The sound quality may be what you were hoping for. 🙂 Or even set up all three and "listen" what's best.
Of the three XOs that you show in Post #17, XO-2 seems to have the best phase tracking.
In regards to Speaker Dave's post #3, take a look at your XO-2.
Notice that the summation is around 88 dB. Look at where the drivers are 20 dB down (~68 dB). (Below that, they aren't contributing much to the summation.)
The tweeter is 20 dB down at about 1700 Hz and the woofer is 20 dB down at about 5500 Hz. The crossover point is around 2900 Hz.
If I read the phase curves correctly, the two drivers are tracking closely up to the crossover frequency, but then they diverge above that.
Speaker Dave comments that,
So that is a good rule of thumb: strive for a phase difference of less than 90 degrees over the range where either unit is within 20dB of the other.
Others have noted that 30 deg or less is very good phase tracking.
Ctrix shows an example with very close phase tracking through the crossover region (approx. 1800-5100 Hz). Probably less than 10 or 20 deg.
I would suggest setting up XO-2 configuration and then listen to it. The sound quality may be what you were hoping for. 🙂 Or even set up all three and "listen" what's best.
Thank you so much AllenB and Dave R and ctrix- you have been very helpful. I setup XO-2 and XO-3 and listened for an extended period of time and they both sounded good but XO-2 was much more detailed in the high mid - low treble range with a smoother sound in the crossover region and off axis was definitely better
I appreciate your help