I just replaced my dash speakers with the Infinities from Crutchfield. They sound fantastic...HOWEVER. Now I have an ANC issue when the RPMs are held at about 1900. I unplug the new speakers and the ANC issue goes away so I know it is the new speakers. Put the stock ones back in for now. Anyone else have this issue? I saw Patsy1099 did and just disconnected the ANC. Is there a TSB or should I try another set of speakers? Don't really want to loose my ANC.
Do a search on this. There is another thread that went into detail and there are lots of questions on the polarity Ram used at each speaker. Several have had to unpin the Metra adapters to reverse the polarity to make the ANC behave again. From what I've read, that should solve your issue. You could also test the +/- of your factory speakers to see if they acutally line up to what the Metra adapters are using. You have at least one that is out of phase from what the ANC expects.