1000 Pro with SAM (Dynaudio Focus 360)

[Redwingnine]

I use 440-Pro and tried SAM for my speakers that I did not like. It just made the sound very un-natural and electronic hence for the last 3-4 years, have always preferred as SAM OFF. I do use a pair of subs with my 2-ch speakers therefore the combo of fullrange floorstanders + pair of subs together is just amazing without any additional electronic help from the Devialet. 

However, I have DPM set to OFF that I find improves reproduction esp. the dynamics.

Interesting.  Perhaps SAM is speaker dependent as to performance?   A few years back, tried SAM with a pair of ATC SCM-19 V1, and did not care for it at all.  Worked just as you described. 

However, with the Dynaaudio 360's, the improvement is remarkable.  Sounds very natural.  In fact, it makes the playback sound more natural, not less.  Maybe SAM integrates better with larger three way floor standing speakers as opposed to monitors?  Since it only impacts below 200 Hz, could see where that would make some sense.  It would not impact the midrange driver of the three way, but would impact the monitor driver.

Nope. It's not the size / type of the speakers. I had Contour 60's. The higher the class of the system - the easier to hear the DSP "artifacts".

Not entirely sure I buy this.  The entire Devialet architecture is a computer based design.   The few reviews I've read that demurred about Devialet sound quality complained the entire sonic signature sounds like a digital artifact.  I certainly don't agree with that.  

The SVS subwoofers also use DSP to shape the filtering.  Do you also hear artifacts with that?   I don't hear any artifacts with the PC4000.  

Since SAM only deals with frequencies at or below 150 Hz, that is a smaller subset of musical instruments.  Most likely to impact the very lowest register of piano, bass, and cello primarily.  Can't say that I've noticed a significant amount of digital artifacts with SAM on.  I actually notice less digital artifacts with SAM than I do when listening to the Devialet without the Chord M-Scaler in the loop as a front end processor.  The M-Scaler actually is more noticeable in reducing (time domain) digital artifacts than any perceived artifacts generated from SAM.