Hallo! I both Yamaha RX-V1400 surr.rec. and found first problem.If I use optimizer microphone setup on the end of the setup I can see warning message OUT OF PHASE - CENTER CHANEL , but speaker is connected correctly.Do I have defective speaker or should I switch + and - (damage???) . Please help.Thanks ROB

You will not damage your speaker by reversing the polarity. Yes, your speaker could be wired internally out of phase. Try listening for the difference, if your center is a match with your L & R, you should notice a difference if one is out of phase.
Or, try hooking up one of your L or R speakers to the center channel output to see what the Yammy tells you then.

Thanks geraldb for really quick help!I both Boston VRC center,Boston front VR1, surr.sp. Boston Bravo. I can not try it now because setup is so loud ,but I am going to try it tomorow in the afternoon and I will let you now.Anyway -how should sound speaker out of phase (no treble or mid range?) and other question- is better use optimizer mic. or manual setup?That optimizer look cool. Thanks again Rob

I could not sleep,so I found out over night!After change + and - center chanel sound so much better.Now is a question- return speaker and get new one or forget and leave it like that? Maybe it is only bad color of two srews maybe mess in wires inside (tweeter - midrange)? Rob

Don't assume it is the speaker that is wired out of phase. I dealt with an amplifier a while back that had one channel reversed inside the case. It came from the factory like that. If it sounds better with the speaker "reversed", isn't that all that matters?

like chad said, If it works leave it, unless it really bugs you.

I seem to remember reading in the Audio review forum a while back about some Yamaha receivers coming from the factory with some of the speaker outputs that were out of phase.

This message was edited by Bruce Sinclair on 12/23/03 09:25.

If the speaker is a three-way design, some designers connect the midrange out of phase. The Yamaha set-up may react to this situation.

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Usually, speakers are hooked-up such that when battery's "+" terminal is conected to a speaker's "+" terminal, the speaker cone will jump away from the basket. I'm not aware of any "speaker police" that will enforce this. It is possible that your center speaker's internal wiring is different from the other speakers you are using.

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As others have mentioned, I think your best bet is to thank the Yamaha for pointing this out and move on.