2x6, note that the linked site, whether done intentionally or not, is misleading and has been a cause of unwarranted suspicion. The manufacturer's ratings are in the majority of cases with the FTC reg required two-channels driven, yet the site doesn't show that, but rather a five-channels driven number. The tests(including Stereo Review/S&V) have confirmed the accuracy of the ratings and any "variance" has been to the upside.

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Enjoy the music, not the equipment.