I also noticed that, Randy, and the 4dB increase in the sensitivity spec also appears in the anechoic measurement(92dB vs the former 88dB). This appears to be rather unlikely, especially since the M22 is still shown at 89dB, and the M2, M50, M60 and M80 also don't show a similar increase(which would actually represent more than a doubling of efficiency).

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Enjoy the music, not the equipment.