AR surround Posted September 16, 2021 Report Share Posted September 16, 2021 As many of you know, I have AR9's as front speakers and AR90's as surround speakers in my 7.1 audio system. It has been documented in this forum, by DavidR for one, that the LMR, UMR and tweeter in the AR90 are wired out-of-phase with the woofers. Until today, I did not think that this internal wiring of the AR90 made a difference. However, I recently acquired a new Marantz AVR which includes Audyssey automatic setup. When I ran the first test, Audyssey detected that the AR90's were out-of-phase with all of the other speakers and stated that I should swap the polarity of the AR90's wiring. I did the wire swap on both AR90's, reran the test, and Audyssey indicated that there were no phase problems. I find this quite bizarre because when playing the "phase test" of a calibration disc specifically made for a 7.1 audio system, the AR9 and AR90 speakers clearly sounded in-phase compared to each other without swapping the speaker wires to the 90's. Now I'm wondering if I've opened up a can of worms for those of us using AR90's with other speaker models in the same audio system. Quote Link to comment Share on other sites More sharing options...
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