Sorry for the slang language, Peter.
SAM stands for Speaker Active Matching, a DSP protocol, developed by Devialet, to adapt the frequency response, phase angle and timing of the signal below 150 Hz, as to correct for (part of the) distortion the speaker introduces. Somewhat along the lines of what Lyngdorf do with their RoomPerfect (but not quite). One major difference, when compared to RoomPerfect, is that SAM needs a specific DSP-setting per speaker. Devialet has a 'vote for SAM' page, where one can vote for a speaker one wants SAM to be applied to. We helped Matt49 to get the necessary 100 votes for his Martin Logan Montis speakers (which in the end appeared not to be suitable for SAM, but that's another story). That's what Hifi Outlaw was referring to...
But in short: nothing to do with your KEF R500s (yet)... So thinking about it: we kinda hijacked your thread here. Sorry for that!
By the way, I for one wouldn't mind if you wrote a review on your TDAI2170 (if and when you find the time for that)!