I think Dolby's new "Dolby Volume" (only avail on the top of the line HK and Arcam, sounds like an intersting feature, this will stop people from constantly adjusting your volume, and then losing the highs/lows and lower volumes, since the midrange freq's is more what we naturally hear.

Not sure if trinnov's Dynamic Volume has the same technology built into or not, but it is available in more models on the market.

http://www.youtube.com/watch?v=Pw1_iGwkkt4

http://www.dolby.com/consumer/technology/dolby-volume-works.html

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