lism speakers out of phase, says yamaho recevier. Help

My old yamaha avr did the same thing... it was annoying, it did it on my rear surrounds which are bipole/dipole which I can understand... but my Marantz with Audessy doesn't do it. It must be the way reflections are hitting the microphone, and nothing to worry about as long as they are wired correctly, and that the speaks themselves are wired correctly. Did you check the yamaha site... I recall doing that some years ago when I had mine.

which way sounds better to you ?

Aside from the phase cancelation resulting from reversed speaker cables causing the end of life as we know it, there shouldn't be any issues.

He's running YPAO and I've had the same issue with out of phase.
Christper2000 how big is your room and how close are the speakers to the walls?
The YPAO is reading a lot of room reflections just ignore it, it's fine..

Nightfall wrote: »

That is pretty funny.

If it says it's in phase, you're good to go. If it says it's not in phase then ignore it.

Thanks for all the "comforting" words!

Didn't want to hihack this thread. I beleive OP is using YPAO and I am using MCACC, but I think this is all relavant information.
I played more over the weekend reversing speaker polarity and run tests. Surprisingly, MCACC was able to tell me each wire that I have reserved or reversed back. At a time there were 4 speakers reversed and the other 3 did not. So, I think it's measuring something on each speaker individually in addition to the relative phases among the speakers.

I don't know if this is true or not but I think LSiM must have wider dispersing angles than LSi speakers. That would lead to different room relections patterns. And that must be why I didn't get this out of phase messages with LSi while everything else remains identical.

The reason the AVR says to ignore the message if the wires are connected correctly is becasue the auto adjustment will try to compensate group delays for phase controls (at least that's the case on my model). So, at the end, I decided to leave all wires connected corretly as they should be and ignored the message as many people have suggested.

Dog seems to like the result, and wife likes it too. No cats.

I reran YPAO in my office yesterday for the first time after the 1.8 upgrade and it told my my lsim 703 are out of phase. This seems like it's a bug in YPAO, since this room previously ran without any warning and nothing has moved.

Guys I'm a little confused here....how can signal reflection cause a piece of equipment to display a message that the output load is out of phase? The internal wiring of the speaker or the amp would have to be crossed assuming the correct polarity is maintained between outs of amp and ins of the speakers? Never had this problem as described....interesting!!

Msabot1 wrote: »

....how can signal reflection cause a piece of equipment to display a message that the output load is out of phase?

My understanding is this. If the soundwave from each speaker all arrive at the mic at the same time, then none of them would be out of phase. When soundwave from a speaker arrive late (meaning there is a delay between when the test signal is generated and when the sound is picked up by the mic), then that speaker may be considered out of phase. It is a matter of delays in sound traveling and room reflections can cause that to the measurement.

Those soundwave frequencies are measured in Hertz, which means the dealy would be in thounsands of a second. Quite subtle for the mic to pick up and measure. Make sure the mic is stationed with a tripod. It needs to be perfectly leveled and facing the ceiling without obstruction and positioned right at the normal listening positon where your ear would be.

In my case as I mentioned, there is nothing wrong with my speaker wiring. However, I can reverse polarity on any speaker and the system would flag that one as out of phase. I tried it on several speakers and each time the system flagged it correctly. So I am quite sure it's a result of delays caused by reflections. I don't know about YPAO (mine is pioneer) but a quick seach tells me that it can compensate for phase shift by adjusting speaker distances. That's why it says to just ignore the message if the speaker is wired correctly.