SAM effects

[Mikeeo]

Frank, do you (or does anyone else) know how the speaker protection in SAM actually works? The point that I find hard to understand is how SAM can measure cone excursion "in real time" (as it claims on the SAM pages). That's to say, how can the DSP in the amp know how far the cone is moving without physically measuring it (which Devialet can do in their labs but is impossible "in real time")?
I could understand if SAM worked predictively, i.e. based on the lab measurements, SAM would be able to predict what SPLs were likely to generate excessive cone excursion and would limit power accordingly. But that's not really "in real time", is it?
Not sure if I've expressed myself clearly.
Matt

Matt,

I now have some 400 hours on my Raidho X1. I've been raving about these and chose them over Raidho D1. Now with some hours down the line, with SAM of course, I have a few comments. SAM works, for sure, bringing better coherence to the whole freq spectrum. Added octave down in the bass region. Now it comes: The protection works, and that is great in avoiding any problems with overpowering. BUT, for me in my home and with 400 W in each channel playing orchestra levels of sound pressure, for sure bass get less with increased volume, good but really bad when it comes to classical full orchestra volume. If I take down the volume bass is there again. These are wonderful speakers but I already started to look at replacements because of this limitation. Low lever listening gives some really full sound down to 25 Hz, but when these speakers are called for some output, SAM cool everything down. Disabling SAM does not help as without one octave is lost and the coherence for the rest is lost. 
The fact that these speaker probably are about 80 dB/1W this does not help on the output side (some magazine tester reported 80 dB/1W for the C1.1 model).
I notice clear how SAM goes in and protect/Mike

I thought my hunt for loudspeakers was over but I guess it will begin again.