Originally Posted by BIC2
I've had the system for several months and just gave up and lived with it. Now that I rearranged my two subs, it got me back at it. I'll try YPAO all over again from scratch.
As far as the reverse polarity, my speakers are two-way and every time I run YPAO, it chooses a different speaker as having reverse-polarity. If that isn't a YPAO issue, what else could it be? YPAO was also measuring a couple of speakers, which are about 12 ft away, as 80 ft. YAPO finally got one close to 12 ft and the other 18 ft.
I do use a rubber foot mounted tripod on carpet over concrete or from the riser, carpet over OSB. Might sit it on headrest next time. So do I go with the YPAO distances or the tape measure? I'm confused on this point. I understand we're talking time delay, which is not actual distance--but it sort of is.
I have 5+5 seats, but mostly just wife & I. Do you recommend multi-position or just MLP. I've been doing just MLP (my wife couldn't care less). Thanks.
I have 3 way speakers from a studio monitor company. I actually opened up the speakers and compared their wiring as I was getting similar results as you. Sometimes showing one reverse polarity and sometimes the other.
After looking at their internal wiring, and doing a lot of research online about 2/3 way speakers. I found the following:
-2/3 way speakers sometime reverse the polarity of one or two of the drivers to create helpful interactions.
-My two identical 3-way speakers were wired differently internally (manufacturing defect)...... I chose to correct them to the way that made the most sense. The mid speaker being reverse, tweeter and sub being normal.
This instantly fixed the YPAO reading being wrong and varying every time i ran it.
I have also gotten speakers that are simple 15 inch woofers and a compression driver wired completely backwards. The assembly team must've taken lunch break making those....
In regards to your other questions:
Go with the YPAO distance measurements, it knows better than you do. (as others have said it is adjusting for time, and can be accounting for external amp delay/differences)
If one of your speakers is at 80ft, you have a signal path issue to that speaker. Are you using an old AVR as an amp that has an old calibration set in it? Or it has that reverse polarity issue...
A difference of 12ft to 18ft is normal.
Ah I see that a new YPAO mic fixed it. Interesting. I'd still check the speakers for polarity issues with a 9-volt battery to each speaker individually.