How the speaker is internally wired can be the case. I would jump on that explanation aside from the following observations: 1) If related to the speaker wiring, then all speakers of the same model will report the same error. In my case, 1 of 2 front speakers and 3 of 4 ceiling speakers suggest that there is something more causing the reported error. 2) The speakers Denon and Marantz receivers indicate as having a phase issue is inconsistent. My current guess is that the room is causing Audyssey to detect the phase error. Variations in reflections of sound is causing the phase inconsistencies. As room furnishings change, so does the speaker which Audyssey reports an error changes. Feel free to offer counter positions as I would like to learn more on how Audyssey calculates the phase errors. Jon

@@ripewave honestly I've never used Audyssey though, I have used Sony's new ES AVR and it did kick back a phase error on Klipsch RP series speaker and then report it as normal on the second run through after disconnecting and reconnecting power. Andrew Robinson had the same thing happen and mentioned it in his 7000ES review. Also, I can't recall who tore down a Klipsch RP speaker but they found the tweeter to be wired out of phase. After the 3000ES was returned, for various reasons, I use a Pioneer Elite VSX-LX505 and have had a variety of speakers from 20 year old MB Quart QL towers, a Klipsch RP 5.0 system, a Klipsch Heritage Theater Bar, various SVS models, and Emotive Airmotiv+ speakers (which I still use) and Dirac has yet to report a phase error. When you mentioned it, at first I was curious if the receiver measured a strange impedance reading but now I'm wondering if something like room reflection is causing Audyssey to "hear" something abnormal.