Ok, I did some reading on this and in order to use timing reference for subwoofer, mic needs to very close to the sub. But what im trying to do is to use the alignment tool to see the delays on main or sub for my MLP. Or am I mistaken, the alignment tool can actually be used without timing reference?
The alignment tool can only be used with measurements taken with a timing reference.
For aligning sub to mains the mic must be at the listening position.
Acoustic timing reference speaker used must have a tweeter.
I’m assuming the issue is you can only send a measurement sweep to right or left. Example using right main as timing ref speaker.
Set XO
Turn off sub
Measure fronts (separately if preferred)
Disconnect front left speaker.
Turn on sub
Send sweep to front left
Now you’ll have the measurements you need. You can use REW trace arithmetic to add the front left and right together or add the sub to itself to get relative volumes correct.
If you have a question when getting into it, post the REW .mdat with your question so someone can have a look at your data if trying to help.