New speakers SAM ready

[AlexS]

Well the effect of SAM is to correct the cone movement from 200Hz
...
The effect will be very small on speakers which are very accurate and full range already, and are more likely to reveal room problems.

I can concede that the "bass echo/resonance" problem I'd observed could possibly be room related, even though my ears (and the brain) told me otherwise: the bass itself did not sound any deeper, so why would it elicit such a nasty resonance from something in the room?
But more importantly, if it's limited to 200Hz and below, why would SAM bereave the mids and highs from air (not to be confused with AIR) and transparency, as a few people here observed?
And then the rather skeptical response from Sonus Faber. They should be glad their speakers (3 models) were SAM'ed one of the first - a welcome marketing boost (for the models still in production). I think their concern with SAM was sincere. But it's not even their response that made me change my mind - it was careful listening. And, frankly, I wanted to like SAM...
Again, I'm not drawing any generalizations as to SAM - I can only speak for my speakers and ears.