Absolutely right, Fred; the NRC(not by SoundStage itself, as was said)measurements for both M80 versions are readily available. They show very good to excellent frequency response for both and in particular no huge 9-10dB rise between about 3KHz-15KHz exists. The listening window average, which includes plus and minus 15 degree vertical measurements also shows none of the huge vertical angle frequency irregularities.

The NRC(National Research Council of Canada)is recognized as one of the most experienced and competent organizations which measure speakers. It's those measurements which can be trusted and which square with the generally excellent(in view of varying subjective preferences)user experience with the M80s.

As Alan has reported here on several occasions, his suggested modifications after he came to Axiom apparently resulted in greater lower mid-range smoothness from about 200Hz-1000Hz. That's about it.

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Enjoy the music, not the equipment.