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I tried to find a reveiw for the Aperion 633 with some kind of measurments but was unable to. I did however find one featuring the Aprion 632 bookshelf. If they are at all like Axiom and they keep the same sound signiture through out the line then it would give some idea of what to expect from the 633.



Thank you for the excellent responses so far! Please keep them coming.

I was able to find a frequency response curve for the 633T from a review found at Ultimate AV mag here




There were some other response curves in that article also.

I also found some independent measurements of the m80 here



This provides a nice comparison. Am I right in saying the response of the m80 not only being flatter, is better because it maintains its line at approx 90db instead of approx 85-87 db on the 633? This would tell me the m80 is more sensitive.