Tweeter measurements with REW

[gugol]

Hello,
I'm using REW to measure the freq response of a woofer and tweeter for a 2 way speaker.
My question is about the tweeter: I think it's dangerous to run a log-sweep on it starting from 20Hz, so normally I start from 600Hz.
But doing so, I think that the phase content is not complete or correct, compared to the woofer one.
I use VituixCAD as simulator software for crossover filter design and it is suggested to run the logsweep from 5 to 41KHz, even worse!

So, does phase matter or not?
Any help on this?
Thanks and regards,
Gugol

 

[John Mulcahy]

Should get reasonable phase information if you start the sweep a decade below the planned tweeter crossover frequency. The tweeter will be almost entirely minimum phase so as long as you are not crossing over below the natural response of the tweeter I'm not sure what use you would make of the phase information.